Braulio Marcelo Castillo, s/k/a Braulio Marcello Castillo v. Commonwealth of Virginia , 70 Va. App. 394 ( 2019 )


Menu:
  •                                            COURT OF APPEALS OF VIRGINIA
    Present: Chief Judge Decker,* Judge Malveaux and Senior Judge Haley
    Argued at Fredericksburg, Virginia
    PUBLISHED
    BRAULIO MARCELO CASTILLO, S/K/A
    BRAULIO MARCELLO CASTILLO
    OPINION BY
    v.      Record No. 0140-17-4                               JUDGE MARY BENNETT MALVEAUX
    JUNE 4, 2019
    COMMONWEALTH OF VIRGINIA
    FROM THE CIRCUIT COURT OF LOUDOUN COUNTY
    Stephen E. Sincavage, Judge
    Thomas K. Plofchan, Jr. (Westlake Legal Group, on briefs), for
    appellant.
    Eugene P. Murphy, Senior Assistant Attorney General (Mark R.
    Herring, Attorney General, on brief), for appellee.
    Braulio M. Castillo (“appellant”) was convicted of first-degree murder, in violation of Code
    § 18.2-32, burglary with the intent to commit murder, in violation of Code § 18.2-90, and violation
    of a protective order, in violation of Code § 16.1-253.2. On appeal, he challenges several of the trial
    court’s decisions: (1) the denial of his motion to sever the protective order violation and the
    admission of the protective order; (2) the refusal to strike Juror Colbert for cause and to properly
    examine Juror Anderson; (3) the finding that he waived attorney-client privilege concerning notes
    found on his iPhone; (4) the admission of “cadaver dog” evidence; (5) the denial of motions for
    mistrial based upon prosecutorial misconduct; (6) allowing for the testimony of a child via
    closed-circuit television; (7) the admission of testimony regarding his exercise of his right to remain
    silent; (8) the limitation of cross-examination of certain Commonwealth witnesses; (9) the denial of
    *
    On January 1, 2019, Judge Decker succeeded Judge Huff as chief judge.
    his motion to set aside the verdict based upon a Brady violation; and (10) the refusal to review notes
    from an interview in camera. Finding no error, we affirm.
    I. BACKGROUND
    Appellant and the victim, Michelle Castillo, were married and lived in a home in
    Ashburn, Virginia. They had four minor children, V.C., J.C., Z.C., and B.C., and an adult child,
    Nicholas, who lived away from home at college. The victim and appellant separated in March
    2013. At that time, the victim petitioned for and was granted a protective order on behalf of
    herself and the minor children. The order required appellant to “refrain from committing further
    acts of family abuse.” The protective order also gave the victim legal custody of the children and
    possession of the marital residence. Appellant was allowed to see the children for dinner on
    Wednesday nights and on every other weekend but was prohibited from entering the residence.
    Two to four weeks after entry of the protective order, the victim filed for divorce. She
    requested spousal support and child support. Her divorce attorney described the divorce as
    “hotly contested,” and testified that he believed the victim was eligible for a combined total of
    $14,000 to $20,000 a month in child support and spousal support. On March 14, 2014, the
    parties appeared in court for a pendente lite hearing, which was continued to May. The victim’s
    demeanor in court on March 14 was “happy,” and she was observed smiling and laughing.
    The following day, the victim, who had trained as a triathlete after separating from
    appellant, ran a marathon and qualified for the Boston Marathon. She planned to compete in an
    Iron Man competition in November 2014, and her friends stated that she was excited about her
    plans and upcoming travel.
    On the evening of March 19, 2014, the victim met several members of her triathlon team
    at a restaurant. She appeared happy and excited that she had qualified for the Boston Marathon.
    The victim left the restaurant to pick up her children from visitation with appellant.
    -2-
    The minor children had been visiting appellant for dinner that night at his house, which
    was approximately a thousand yards from the victim’s home. Lucy Fuentes, appellant’s sister,
    was also at the dinner, and she left appellant’s house at 8:05 p.m. and drove the children to meet
    the victim at a Harris Teeter grocery store a few miles away.
    Security footage from a neighbor’s house showed a male jogger arriving at the victim’s
    home and walking up the driveway about ten minutes before the victim arrived with the children.
    Although the jogger’s face is unidentifiable from the video, Nicholas Castillo and David and
    Stephanie Meeker, friends of the Castillos, identified the jogger as appellant based on the
    jogger’s unusual gait.
    The following morning, the children woke up and discovered the victim was missing. In
    the victim’s bedroom, J.C. noted that the bed had been made up “messily” and without the
    victim’s usual care. Several other witnesses also testified that the bed was not made in the
    manner typical of the victim. J.C. had to pick the locks to enter the victim’s bathroom, where he
    found the shower running with no one in it. J.C. called appellant and told him he could not find
    the victim.
    A little after 7:00 a.m., appellant knocked on the door of the victim’s neighbor, Ahmed
    Qureshi, and told him that the victim was missing. Qureshi noticed that appellant was wearing
    sunglasses and that it appeared there was “something around” his left eye. Because appellant
    was prohibited from entering the victim’s home, he asked Qureshi to accompany him to the
    residence. There, Qureshi quickly checked the exterior before entering to find appellant upstairs
    examining the victim’s bedroom. After appellant came downstairs and joined the children in the
    kitchen, Qureshi asked J.C. if anyone had searched the basement. Appellant responded that they
    had already searched that area. Qureshi stated that they needed to call 911, but appellant told
    -3-
    him that he needed to get the children to school and left with them. Qureshi returned home,
    called 911, and reported that the victim was missing.
    Law enforcement officers arrived at the residence and searched the basement, where they
    discovered the victim hanging from a shower head in a bathroom. The victim was wearing a
    sweatshirt.
    Detective Mark McCaffrey with the Loudoun County Sheriff’s Office and the lead
    investigator in the case, called appellant that morning and told him that he needed to speak with
    him about the victim’s disappearance. Appellant stated that he was taking care of his son and
    would call back. McCaffrey drove to appellant’s house and informed him of the victim’s death.
    Appellant expressed no emotion when he learned this information and did not ask any questions
    about the circumstances of his wife’s death. McCaffrey noticed that appellant had a black eye
    and a fresh scrape under his eye.
    The medical examiner, Dr. Constance DiAngelo, testified that the manner in which the
    victim died was inconsistent with suicide. DiAngelo found multiple bruises and abrasions on the
    victim’s body and stated that such bruises were “very, very unusual” in suicide cases. She also
    stated that it was very unusual to find a suicide victim’s hair underneath the noose, as in this
    case. DiAngelo opined that the injuries to the victim’s neck and face indicated that she died as a
    result of suffocation and strangulation involving elements of both manual and ligature
    strangulation. DiAngelo testified that she found two ligature marks on the victim’s neck: a
    deeper, horizontal mark that was consistent with strangulation at the time of death, and a more
    shallow mark with a different orientation which was consistent with the victim being hung in the
    shower after death.
    The Virginia Department of Forensic Science analyzed bloodstains found on the victim’s
    bed linens and the sweatshirt she was wearing and identified the presence of appellant’s DNA.
    -4-
    One of the victim’s friends identified the sweatshirt as belonging to the victim. The victim’s
    housekeeper testified that she had not seen appellant in the home following the issuance of the
    protective order a year earlier.
    Two victim recovery dogs were deployed inside the victim’s home seventeen days after
    her death. Morse, commonly referred to as a “cadaver dog,” was trained to alert to the odor of
    human decomposition and large quantities of dried blood; Keela, the second dog, was trained to
    detect the odor of smaller quantities of dried blood. Morse immediately alerted to the basement
    bathroom where the victim’s body was found and later alerted to a carpeted area at the base of
    the victim’s bed. Keela was “detailed” to the carpeted area where Morse had alerted, but she did
    not alert. She only alerted to the victim’s underwear drawer.
    A crime scene investigator with the Loudoun County Sheriff’s Office testified that he
    was unable to obtain fingerprints from the walls of the basement shower despite the fact that
    ceramic tile similar to the ones in the shower typically made obtaining prints easy. Nicholas
    Castillo testified that he had visited his mother and used her basement shower the weekend
    before her death.
    On March 21, 2014, the day after the victim’s body was discovered, appellant called his
    orthodontist to report that he had a broken braces bracket and to schedule an appointment to
    repair it. The orthodontist testified that a bracket will become loose after external pressure or
    force is applied to either the tooth or the bracket.
    J.C., who was eleven at the time of trial, testified that in the year preceding the victim’s
    death, appellant had asked him for the passcode to the victim’s home security system. The
    victim had changed the code after appellant moved out. J.C. gave appellant the code, but then
    told the victim, who changed it again. When appellant later inquired about the passcode, J.C.
    -5-
    refused to provide it, even after appellant told him that he would give him a gold coin in order to
    obtain the code. J.C. stated that his refusal to provide the code angered appellant.
    Z.C., who was eight at the time of trial, testified that on the night of March 19, 2014, he
    returned to the victim’s home after dinner at appellant’s house and slept with the victim for part
    of the night, but then went to sleep with his brother J.C. He left his blanket in the victim’s bed.
    Z.C. testified that appellant brought him his blanket that night while he was in J.C.’s room.
    Eight days after the victim’s death, appellant filed a motion to dissolve the divorce.
    Having survived the victim, appellant became sole owner of the marital estate, the value of
    which was estimated at between $2.6 and $3.6 million.
    On June 20, 2016, the jury found appellant guilty of first-degree murder, burglary, and
    violation of a protective order.
    II. ANALYSIS
    A. Severance / Protective Order
    A grand jury indicted appellant on three charges: murder in the first degree, in violation
    of Code § 18.2-32; burglary with the intent to commit murder, in violation of Code § 18.2-90;
    and violation of a protective order, in violation of Code § 16.1-253.2. Prior to trial, appellant
    filed a motion to sever the violation of a protective order charge. After hearing argument, the
    court denied the motion to sever, finding that the offenses were based on the same act or
    transaction and that justice did not require separate trials.
    The protective order was entered into evidence at trial. The order reflected that it was in
    effect at the time of the victim’s death. The protective order listed the victim as the petitioner for
    the order, which was also granted on behalf of the parties’ minor children. The order stated that
    the court had found that the victim had “proven the allegation of family abuse by a
    preponderance of the evidence” and ordered appellant to “refrain from committing further acts of
    -6-
    family abuse.”1 The order granted the victim the exclusive possession of the marital residence
    and ordered appellant to “stay away” from the property.2
    Discussion
    Appellant argues that the trial court erred by denying his motion to sever the violation of
    a protective order charge from the murder and burglary charges and in admitting the protective
    order.3
    “Whether different offenses should be tried separately is a matter that rests within the
    sound discretion of a trial court. Thus, a trial court’s ruling on the matter will not be reversed
    absent a showing that the court abused its discretion.” Cheng v. Commonwealth, 
    240 Va. 26
    ,
    33-34 (1990).
    Rule 3A:10(c) allows cases to be joined for trial if justice does not require separate trials
    and either “the accused and the Commonwealth’s attorney consent” or “the offenses meet the
    requirements of Rule 3A:6(b).” “Under Rule 3A:6(b), two or more offenses may be joined in a
    single indictment ‘if the offenses are based on the same act or transaction, or on two or more acts
    or transactions that are [a.] connected or [b.] constitute parts of a common scheme or plan.’”
    Scott v. Commonwealth, 
    274 Va. 636
    , 644 (2007) (quoting Rule 3A:6(b)). Therefore, if a
    1
    Code § 16.1-228 defines “family abuse” as “any act involving violence, force, or threat
    that results in bodily injury or places one in reasonable apprehension of death, sexual assault, or
    bodily injury and that is committed by a person against such person’s family or household
    member.”
    2
    When the Commonwealth asked the court to admit the protective order at trial, counsel
    for appellant argued that the order itself did not need to be admitted and stated that he was “fine”
    with the court instructing the jury about the protective order. Counsel also asked that, if the
    court was going to admit the court order itself, it redact the judge’s signature on the order,
    because the judge that issued the protective order was the same judge presiding at trial. The
    court redacted the signature and entered the order, which was redacted in this manner. Counsel
    did not ask the court to redact the order’s “family abuse” language.
    3
    Appellant did not object to the court trying the murder and burglary cases together.
    -7-
    defendant does not consent to joinder, the Commonwealth must establish that the offenses were
    either part of the same act or transaction or part of a common scheme or plan and that justice
    does not require separate trials.
    We conclude that the three charged offenses met Rule 3A:6(b)’s requirements for joinder
    because all three offenses were clearly “based on the same act or transaction.” Appellant broke
    into the victim’s house in violation of the protective order with the intent to murder her. He did
    not leave the residence until he had committed the murder. Each offense took place at the same
    location and at the same time.
    Finding the offenses meet the “same act or transaction” requirement under Rule 3A:6(b),
    we must now determine whether justice required appellant to have separate trials.
    “Justice requires separate trials where the evidence of one of the crimes is not admissible
    in the trial of the other.” Godwin v. Commonwealth, 
    6 Va. App. 118
    , 123 (1988).
    Generally, “[e]vidence of other independent acts of an accused is inadmissible if relevant
    only to show a probability that the accused committed the crime for which he is on trial because
    he is a person of bad or criminal character.” Sutphin v. Commonwealth, 
    1 Va. App. 241
    , 245
    (1985). However, such evidence is admissible when it is “relevant to an issue or element in the
    present case.” Id.4 Accordingly, evidence of an accused’s prior bad acts may be properly
    admitted
    (1) to prove motive to commit the crime charged; (2) to establish
    guilty knowledge or to negate good faith; (3) to negate the
    possibility of mistake or accident; (4) to show the conduct and
    4
    In the instant case, while the protective order does not identify any specific act that
    justified the issuing court’s finding that appellant committed family abuse, it permits the
    inference that appellant engaged in prior misconduct, and thus requires treatment as “prior bad
    acts” evidence. See Price v. State, 
    245 S.W.3d 532
    , 537 (Tex. App.--Houston [1st Dist.] 2007)
    (“While the protective order does not identify any specific act that justified the issuing court’s
    finding that [defendant] committed family violence, it permits the inference that [defendant]
    engaged in prior misconduct that is not alleged in either indictment, and thus requires treatment
    as extraneous offense evidence.”).
    -8-
    feeling of the accused toward his victim, or to establish their prior
    relations; (5) to prove opportunity; (6) to prove identity of the
    accused as the one who committed the crime where the prior
    criminal acts are so distinctive as to indicate a modus operandi; or
    (7) to demonstrate a common scheme or plan where the other
    crime or crimes constitute a part of a general scheme of which the
    crime charged is a part.
    Quinones v. Commonwealth, 
    35 Va. App. 634
    , 640 (2001) (quoting Lockhart v. Commonwealth,
    
    18 Va. App. 254
    , 259, opinion withdrawn and vacated on other grounds on reh’g en banc, 
    19 Va. App. 436
    (1994), aff’d, 
    251 Va. 184
    (1996)); see also Va. R. Evid. 2:404(b).
    This list is neither exhaustive nor definitive; intent, general (as
    opposed to guilty) knowledge, agency, premeditation and other
    elements of criminal acts are all subsumed within the exceptions to
    the general rule and may be shown by prior bad act evidence when
    relevant to prove a material element or issue of the crime charged.
    Lafon v. Commonwealth, 
    17 Va. App. 411
    , 417 (1993). Further, we note that Virginia law
    “follows an ‘inclusionary approach’ to the uncharged misconduct doctrine by admitting such
    evidence ‘if relevant, for any purpose other than to show a mere propensity or disposition on the
    part of the defendant to commit the crime.’” Thomas v. Commonwealth, 
    44 Va. App. 741
    , 757
    n.8 (quoting Kent Sinclair, Joseph C. Kearfott, Paul F. Sheridan, & Edward J. Imwinkelried,
    Virginia Evidentiary Foundations § 6.4[A], at 165 (1998)), adopted upon reh’g en banc, 
    45 Va. App. 811
    (2005).
    Applying the principles outlined above, we conclude that the protective order itself was
    admissible in both the first-degree murder trial and burglary trial.
    To sustain the charge of first-degree murder, the Commonwealth had to show that
    appellant committed a “willful, deliberate, and premeditated killing.” Code § 18.2-32. The
    Commonwealth’s theory of the case was that appellant willfully killed the victim by entering the
    marital home in violation of the protective order and then murdering her in her bedroom. Here,
    the protective order was admissible to prove appellant’s opportunity to commit the murder. The
    -9-
    protective order demonstrated that appellant had been barred from entering the marital residence
    for the prior year. However, appellant’s DNA was recovered from bloodstains found on the
    victim’s bed linens and the sweatshirt she was wearing. The protective order shows that it was
    unlikely he had entered the residence prior to the night of the murder, and thus tended to prove
    that his DNA found in the bedroom was a result of his presence in the victim’s bedroom the
    night of her death. Because the protective order was relevant to show that there was no
    reasonable explanation for the presence of appellant’s DNA on the victim’s clothing and bedding
    other than his presence in her bedroom on the night of the murder, it served a purpose “other
    than to show a mere propensity or disposition on the part of the defendant to commit the crime.”
    
    Thomas, 44 Va. App. at 757
    n. 8 (quoting 
    Sinclair, supra, at 165
    ).
    We further find that the protective order was admissible in the trial for burglary. Code
    § 18.2-90 provides, in pertinent part, that “[i]f any person in the nighttime enters without
    breaking or in the daytime breaks and enters . . . a dwelling house . . . with intent to commit
    murder, rape, robbery or arson . . . he shall be deemed guilty of statutory burglary.” The
    protective order prohibiting appellant from entering the marital residence demonstrated that
    appellant acted without authority in entering the home. Thus, the protective order was relevant
    “to establish guilty knowledge or to negate good faith.” 
    Quinones, 35 Va. App. at 640
    (quoting
    
    Lockhart, 18 Va. App. at 259
    ); see also Turner v. Commonwealth, 
    33 Va. App. 88
    , 94-95 (2000)
    (rejecting defendant’s argument that he could not be guilty of burglary because he and his wife
    jointly owned the property he was accused of breaking and entering while he was under court
    order to have no contact with wife).
    We conclude that the protective order would have been admissible in both the murder and
    burglary trials as it was relevant to an issue or element in each of those cases. However, in order
    to meet the test for admissibility as other bad acts evidence, the evidence also must be otherwise
    - 10 -
    admissible. “Admission of evidence of other crimes committed by a defendant . . . is subject to
    the further requirement that the legitimate probative value of the evidence must exceed the
    incidental prejudice to the defendant.” Rose v. Commonwealth, 
    270 Va. 3
    , 11 (2005). “[T]he
    responsibility for balancing the competing considerations of probative value and prejudice rests
    in the sound discretion of the trial court. The exercise of that discretion will not be disturbed on
    appeal in the absence of a clear abuse.” Ortiz v. Commonwealth, 
    276 Va. 705
    , 715 (2008)
    (quoting Spencer v. Commonwealth, 
    240 Va. 78
    , 90 (1990)).
    Appellant argues that the protective order would not have been admissible in the murder
    and burglary trials because the evidence was unduly prejudicial. He contends that even if the
    parties’ marital issues were relevant, the existence of those issues was genuinely uncontested
    given that the parties were divorcing. Thus, any probative value of the protective order was
    outweighed by the danger of prejudice to appellant, making the evidence inadmissible. We
    disagree.
    As noted above, the protective order was admissible not merely as evidence of marital
    issues, but also to prove opportunity and establish guilty knowledge or negate good faith.
    Although the protective order reflected that appellant had committed a prior act of family abuse,
    which might have had an adverse effect on him, we cannot say that the trial court abused its
    discretion in finding that the substantial probative value of the evidence would have outweighed
    any prejudicial effect.
    Because the three charged offenses met the requirement of Rule 3A:6(b) and justice did
    not require separate trials, the joinder requirements of Rule 3A:10(c) were met. We hold,
    - 11 -
    therefore, that the trial court did not abuse its discretion in denying appellant’s motion for
    separate trials.5
    B. Jury Issues
    During voir dire, counsel for appellant asked the entire venire a series of questions,
    including whether anyone knew someone who had either attempted or committed suicide.
    Prospective Juror Colbert responded that he did. During individual voir dire conducted outside
    the presence of the rest of the venire, Colbert stated that his neighbors had “some history of
    domestic violence” and that less than two months prior to trial, his female neighbor had hanged
    herself in a closet. When he learned of his neighbor’s death, he immediately thought it murder
    rather than suicide. Although he had called the police, there “was no investigation done” and it
    was “swept under the rug.” Colbert was “suspicious of that.” When asked to explain his
    statement that there “was no investigation done,” Colbert explained that he was out of town
    when the death occurred, but that when he returned, no one called him or his fiancée to see if
    they knew anything about the incident. His fiancée had called the police and briefly talked to
    them, but they did not follow up with her. Colbert had immediately thought it murder rather than
    suicide when he learned of his neighbor’s death. Counsel for appellant asked Colbert if he was
    5
    Appellant further argues under this assignment of error that the admission of the
    protective order was error because it was granted under a civil preponderance of the evidence
    standard, yet was used in a criminal context. Appellant provides no support for this argument
    and we find it unpersuasive, as we find no reason to examine the protective order in a different
    manner than we do for all other prior bad acts evidence generally.
    Further, in this case, the court that issued the protective order found by clear and
    convincing evidence that appellant had committed an act of family abuse. While we make no
    determination on the exact standard of proof that must be applied by a court in determining
    whether to admit evidence of prior bad acts, we find that any standard would be satisfied by a
    clear and convincing finding by a circuit court. See Pavlick v. Commonwealth, 
    27 Va. App. 219
    , 227-28 (1998) (noting that “[n]o Virginia court has directly addressed the issue of the
    standard of proof that must be applied by a judge in determining whether to admit evidence of
    prior bad acts,” but finding that if prior bad acts evidence involves a credibility determination,
    that question is properly reserved for the jury).
    - 12 -
    “going to be able to separate things and keep this terrible experience or in any way separate it out
    from any evaluation of the case here?” Colbert replied, “Yeah, I believe so,” because his
    neighbor “had a history of mental illness, and . . . so even though there was some suspicion . . . ,
    I think there was [sic] experts that could look at these things and advise on what actually took
    place, so . . . .”
    Colbert also told the court that his fiancée had been a victim of domestic violence in the
    past. Counsel for appellant asked Colbert whether this fact or his fiancée’s feelings about the
    neighbor’s death would put any pressure on him if his fiancée knew he was on the jury, and he
    responded, “No.”
    Counsel for appellant moved to strike Colbert in light of his statement that he thought his
    neighbor’s death was murder rather than suicide, and because he was so closely involved with
    the death that “it would be extremely difficult for him to ultimately remove himself from that.”
    Colbert was recalled for further questioning, and the court asked him if the “entirety of the
    circumstances” that he had discussed would affect his ability to “judge this case solely on the
    evidence that is before [him].” Colbert stated that he had come to “a suspicion and a judgment”
    about his neighbor because he had “witnessed . . . and heard things” himself, where in contrast
    “[i]n a case where I know nothing, and there is stuff presented from either side, I have no . . .
    personal involvement, so I would listen to both sides and know that suicide is possible, murder is
    possible.” He further stated, “I think I can listen fairly and make a judgment based on what was
    presented.” The court denied appellant’s motion to strike the juror for cause, finding that the
    further answers given by Colbert clearly demonstrated that “he would be able to deal with this
    case on the evidence in this case.” Colbert served on the jury.
    At the end of the sixth day of trial, the court excused the jury for the day. After the jury
    had left the courtroom and entered the jury room, counsel for appellant told the court that while
    - 13 -
    the door was open he could hear one of the jurors “crying to the extent of howling.” He could
    “hear it through the door” even after the door was closed. The court stated that court personnel
    were separating Juror Anderson, the juror who was crying, from the rest of the jury. Counsel for
    appellant asked the court to question Anderson as to her emotional display, arguing that it would
    be proper to inquire whether she could follow the court’s instructions to hear all the evidence
    before making a decision in the case. The court declined to adopt appellant’s proposed line of
    questioning, and instead brought Anderson back into court and asked her if she was suffering
    from any medical condition that would prevent her from serving as a juror. She responded in the
    negative.
    Prior to the commencement of the next day of trial, the court announced that it would
    further question Juror Anderson. The court also told counsel that a bailiff had informed the court
    that Anderson had commented that “she was now able to breathe” and that it had seemed to
    Anderson “that the witness wasn’t able to breathe.” The witness who had testified immediately
    prior to the crying reported by appellant’s counsel was J.C., appellant’s eleven-year-old son. The
    court questioned Anderson about her statement to the bailiff, and she stated that she “might have
    held [her] breath there for a minute . . . because of the anguish” and that she thought the witness
    was not able to breathe because he had started to cry. She “felt very emotional towards that.”
    The court then asked Anderson several additional questions about her feelings and her ability to
    remain impartial throughout proceedings, in light of “the noise we heard when the [c]ourt was
    closed.” Anderson replied that her ability to remain impartial was “positive” and that her “ability
    right now does not lean one way or the other.” After stating that her ability to remain impartial
    did not lean toward either side, Anderson made a further unprompted statement about her
    impartiality to the court, and the court then asked further questions of the juror.
    - 14 -
    ANDERSON: I’m still here to observe the witnesses and the
    evidence in the case, to determine the outcome. And so nothing
    that has happened so far or what happened to me --
    THE COURT: Okay. Can you speak to --
    ANDERSON: -- will deter me.
    THE COURT: I’m sorry, I didn’t mean to cut you off.
    ANDERSON: Will deter me. Will deter my impression.
    THE COURT: Okay.
    ANDERSON: My ability.
    THE COURT: Okay. Can you speak to us about your ability to
    set aside any emotions that you may have and keep an open mind -
    -
    ANDERSON: My ability to set aside my emotions are better.
    Uh-huh.
    THE COURT: Is what?
    ANDERSON: My abilities to set aside my emotions are better. I
    think I have a little bit more control.
    THE COURT: Better than what? I just want to --
    ANDERSON: Than Friday.
    THE COURT: Okay.
    ANDERSON: I’m more prepared mentally.
    THE COURT: My question has to do with any emotions that you
    have and how they would affect your ability to fairly and
    impartially hear the evidence in this case.
    ANDERSON: I am very -- I am very clear minded. My emotions
    will not cloud my decision or my -- or my ability to hear the
    evidence and hear the witnesses.
    THE COURT: Okay. And are you at this time and throughout the
    trial able to withhold making any fixed or firm formed opinions
    about [appellant’s] guilt or innocence --
    - 15 -
    ANDERSON: Absolutely.
    THE COURT: -- let me finish the question -- until you [have]
    heard all the evidence in the case?
    ANDERSON: Until I have heard all the evidence in the case, yes.
    Following this exchange, counsel for appellant moved to strike Anderson for cause. The
    court denied the motion, noting that the juror had stated that she was able to remain impartial.
    The court also noted that the juror’s behavior had been normal while court was in session. The
    court stated that while Anderson had “spoken of anguish and having to hold her breath,” it could
    not “get behind what the cause of that anguish was.”
    Discussion
    Appellant contends the trial court erred by denying him an impartial jury by refusing to
    strike Jurors Colbert and Anderson for cause.
    It is well established that “the right of an accused to trial by ‘an impartial jury’ is a
    constitutional right, reinforced by legislative mandate and by the Rules of this court.” Justus v.
    Commonwealth, 
    220 Va. 971
    , 975-76 (1980). “Code § 8.01-357 assures a defendant a right to
    an impartial jury drawn from ‘a panel [of not less than twenty] free from exceptions.’” 
    Id. at 975
    (quoting Breeden v. Commonwealth, 
    217 Va. 297
    , 300 (1976)). To qualify as a juror, a
    prospective juror must “stand indifferent in the cause.” Code § 8.01-358. If a juror “does not
    stand indifferent to the cause, he is not competent. If he has any interest in the cause, or is
    related to either party, or has expressed or formed any opinion, or is sensible of any bias or
    prejudice, he is excluded by the law.” Taylor v. Commonwealth, 
    67 Va. App. 448
    , 454 (2017)
    (quoting Spangler v. Ashwell, 
    116 Va. 992
    , 996-97 (1914)); see Griffin v. Commonwealth, 
    19 Va. App. 619
    , 621 (1995) (explaining that “the test of impartiality is whether the venireperson
    can lay aside the preconceived views and render a verdict based solely on the law and evidence
    presented at trial”).
    - 16 -
    “Juror impartiality is a question of fact.” Huguely v. Commonwealth, 
    63 Va. App. 92
    ,
    121 (2014) (quoting Lovos-Rivas v. Commonwealth, 
    58 Va. App. 55
    , 61 (2011)). “Whether a
    venireman can lay aside a preconceived opinion and render a verdict solely on the evidence is a
    mixed question of law and fact. Resolution of the question rests within the sound discretion of
    the trial court.” Calhoun v. Commonwealth, 
    226 Va. 256
    , 258 (1983). “[T]he trial court must
    weigh the meaning of the answers given in light of the phrasing of the questions posed, the
    inflections, tone, and tenor of the dialogue, and the general demeanor of the prospective juror.”
    Smith v. Commonwealth, 
    219 Va. 455
    , 464-65 (1978). Further, evidence of a prospective juror’s
    impartiality “should come from him and not be based on his mere assent to persuasive
    suggestions.” Bradbury v. Commonwealth, 
    40 Va. App. 176
    , 181 (2003) (quoting McGill v.
    Commonwealth, 
    10 Va. App. 237
    , 242 (1990)).
    Although we review the trial court’s determination deferentially, “any reasonable doubt
    as to a juror’s qualifications must be resolved in favor of the accused.” 
    Breeden, 217 Va. at 298
    .
    “In conducting our review, we consider the juror’s entire voir dire, not merely isolated
    statements.” Lovitt v. Commonwealth, 
    260 Va. 497
    , 510 (2000). We will disturb the trial
    court’s decision regarding juror impartiality “only upon a showing of manifest error.” Weeks v.
    Commonwealth, 
    248 Va. 460
    , 475 (1994).
    1. Juror Colbert
    Appellant argues that Colbert’s voir dire revealed his bias. Appellant specifically points
    to (1) Colbert’s statement that he “th[ought] [he] c[ould] listen fairly and make a judgment based
    on what was presented,” and (2) the timing and similarity of his neighbor’s death in relation to
    the allegations presented at trial. He contends that both combined to raise a reasonable doubt as
    to Colbert’s impartiality.
    - 17 -
    While appellant emphasizes Colbert’s use of the word “think,” characterizing his
    response as too equivocal to ensure his impartiality, we note that “the word ‘think’ can have
    different meanings depending on one’s demeanor, emphasis, and tone of voice—and . . . such
    contextual determinations must be made by the trial court during voir dire.” 
    Huguely, 63 Va. App. at 125
    . Further, in the context of statements made during voir dire, “[w]here the record
    does not indicate inflection and tone, we view the statements in the light most favorable to the
    Commonwealth.” 
    Taylor, 67 Va. App. at 460
    n.2. Viewed in the light most favorable to the
    Commonwealth, we construe Colbert’s use of “think” to support a finding that his whole
    statement to the court—“I think I can listen fairly and make a judgment based on what was
    presented”—indicated that he was able to listen fairly and judge based upon the evidence. This
    finding is further supported by the context surrounding Colbert’s statement. Colbert made his
    statement after he was asked whether his past experience with suicide would influence his ability
    to weigh the evidence in this case. His response was that unlike his prior experience, he had no
    firsthand knowledge of the facts of this case and “would listen to both sides and know that
    suicide is possible, murder is possible.” These statements, viewed together in context,
    demonstrate that Colbert’s “I think” statement was not too equivocal to ensure his impartiality.
    Appellant’s additional argument that Colbert was biased because of the recent timing and
    similarity of his neighbor’s death is likewise unsupported by the record. Colbert was specifically
    asked by counsel for appellant if he would be able to separate his past experience from the
    current case, and Colbert replied that he believed he would. He also stated that any feelings his
    fiancée might have about the neighbor’s death would not put pressure on him to decide the case
    in a certain way. Based upon these answers, viewed together with Colbert’s other statements
    that he would listen to both sides, knew that both suicide and murder were possible, could listen
    fairly, and would make a judgment based on the evidence presented, we cannot say the record as
    - 18 -
    a whole demonstrates that Colbert was biased in this matter because of his neighbor’s death.
    Thus, we find that the trial court did not abuse its discretion in refusing to strike Colbert for
    cause.6
    2. Juror Anderson
    Appellant also argues that Anderson, in the mid-trial voir dire, did not provide
    unqualified assertions of impartiality. He alleges that Anderson did not unequivocally state that
    she could set aside her emotions and keep an open mind, and only informed the court that her
    ability was “better” than it had been the previous day at trial.
    However, a full examination of Anderson’s mid-trial voir dire belies these contentions.7
    Before Anderson stated that her ability to set aside her emotion was “better,” the court asked
    about her ability to remain impartial, and she replied that her “ability right now does not lean one
    way or the other.” She further stated, unprompted by the court, that she was “still here to
    observe the witnesses and the evidence in the case, to determine the outcome.” Following her
    statement that her ability to set aside her emotions was “better,” the court clarified that it was
    asking her about “any emotions that you have and how they would affect your ability to fairly
    6
    Appellant also argues that Colbert should have been struck for cause because of his
    statement that “he would rely upon expert testimony to decide the ultimate issue.” However, the
    record before us reveals that appellant never raised this specific issue before the trial court.
    “This Court has said ‘[t]he primary function of Rule 5A:18 is to alert the trial judge to possible
    error so that the judge may consider the issue intelligently and take any corrective actions
    necessary to avoid unnecessary appeals, reversals and mistrials.’” Neal v. Commonwealth, 
    15 Va. App. 416
    , 422 (1992) (alteration in original) (quoting Martin v. Commonwealth, 
    13 Va. App. 524
    , 530 (1992)). Thus, “[n]ot just any objection will do. It must be both specific and
    timely—so that the trial judge would know the particular point being made in time to do
    something about it.” 
    Thomas, 44 Va. App. at 750
    . Because the requirements of Rule 5A:18
    have not been met, we do not consider this argument on appeal.
    7
    When a challenge to a juror’s impartiality arises mid-trial, we “‘will reverse the trial
    court’s decision only for an abuse of discretion,’ applying the ‘same standard’ of review
    appropriate to appellate consideration of a decision to seat a venireperson.” Nelson v.
    Commonwealth, 
    41 Va. App. 716
    , 731 (2003) (quoting Green v. Commonwealth, 
    26 Va. App. 394
    , 401 (1998)).
    - 19 -
    and impartially hear the evidence in this case.” Anderson replied that she was “very clear
    minded” and that her “emotions w[ould] not cloud [her] decision” or “ability to hear the
    evidence.” These statements support the conclusion that Anderson remained impartial despite
    her emotional response to J.C.’s testimony. Additionally, we note that many of Anderson’s
    statements regarding her emotions and impartiality were fully expressed by her and were not
    “mere assent to persuasive suggestions.” 
    Bradbury, 40 Va. App. at 181
    (quoting 
    McGill, 10 Va. App. at 242
    ).8
    In denying appellant’s motion to strike Anderson from the jury panel, the trial court noted
    Anderson had been able to control her emotions in the courtroom. Further, Anderson
    unequivocally stated that she could wait to form an opinion until all the evidence was presented.
    The trial court observed Anderson’s demeanor, heard her responses, and determined she was
    capable of remaining impartial. Nothing in the record demonstrates manifest error in the court’s
    finding that Anderson could impartially continue her service on the jury.9
    8
    Appellant also takes issue with Anderson’s statement that nothing would “deter [her]
    impression,” which he argues suggests that she had already come to a conclusion that would not
    be altered. However, read in its full context, Anderson’s statement cannot be viewed as
    appellant suggests. Anderson’s statement that nothing would “deter [her] impression” directly
    followed her comment that she was “here to observe the witnesses and the evidence in the case,
    to determine the outcome.” Anderson then tells the court that “nothing that has happened so far
    or what happened to me . . . . Will deter me. Will deter my impression.” Thus, in context,
    Anderson’s statement that nothing would “deter [her] impression” was her informing the court
    that nothing would change her “impression,” meaning her ability, to hear the evidence in the case
    as it was presented. Read properly in its full context, it is clear from Anderson’s statement that
    appellant’s argument is without merit.
    9
    Appellant also asserts under this assignment of error that the trial court erred because it
    “harmfully foreclosed any voir dire by [appellant], thus limiting the record without fully
    exploring the issue of partiality.” However, the record reveals that appellant has not preserved
    this argument for our review. Following Anderson’s audible crying, counsel for appellant asked
    the court to inquire whether she could follow the court’s instructions to hear all the evidence
    before she made a decision in the case, but the court instead only asked the juror if she was
    suffering from any medical condition that would prevent her from serving as a juror. Appellant
    then filed a motion asking the court to further question Anderson as to whether she could
    continue to be impartial, set aside her emotions, and fairly consider the evidence and arguments
    - 20 -
    C. Attorney-Client Privilege Protection of Notes
    On the day the victim’s body was discovered, Detective McCaffrey obtained a search
    warrant for appellant’s residence.10 McCaffrey testified that while he did not actively participate
    in the search, he “grabbed ahold of . . . [and] got [appellant’s] cell phone at one point.”
    McCaffrey then told appellant that he “wanted to get the pass code,” and appellant replied he had
    “a secret clearance” and that his phone was important. McCaffrey told appellant “all right, that’s
    fine” and that it would “take up more time to get it forensically analyzed” or “something along
    that line.” At that point, appellant gave McCaffrey the passcode, stating that he was “being
    helpful.”
    At trial, the Commonwealth moved to introduce notes found on the “Notes” application
    on appellant’s iPhone. The Commonwealth’s exhibit contained, among other notes,11 one which
    listed contact information for attorneys. A second note was entitled “Attorney Client Privilege
    (Affair)” and detailed the victim’s activities and interactions with various individuals. That note
    also stated that the “document is being prepared for and in conjunction with attorneys . . . .”
    of both parties. In this motion, appellant “ask[ed] the court to make that limited inquiry and then
    to rule on whether or not she may continue as a juror.” The following day of trial, the court did
    in fact make this inquiry of Anderson. Following the court’s voir dire of the juror regarding her
    emotional state and impartiality, appellant moved to strike the juror based on her responses to the
    court’s questioning. However, at no point did counsel for appellant ask the trial court for the
    opportunity to ask additional questions of Anderson during the court’s mid-trial voir dire. Thus,
    because appellant never argued to the trial court that he should have the opportunity to conduct
    his own independent voir dire, we do not consider this argument on appeal. See Rule 5A:18.
    10
    McCaffrey testified that the residence was searched pursuant to a search warrant. The
    search warrant itself was not made a part of the record.
    11
    The other notes included an article about divorce, Bible verses about divorce, and short
    items entitled “Facebook list,” “Ironman shopping list,” and “Michelle.” Counsel for appellant
    represented that the “Facebook list” note referenced men that the victim had been “seeing” or
    “was going to see.”
    - 21 -
    Appellant objected to the admission of the notes, arguing that they were protected by the
    attorney-client privilege, and moved for a mistrial because “these prosecutors are tainted by
    this.” The court overruled the objection based on attorney-client privilege and denied the motion
    for a mistrial. The court found that an attorney-client relationship existed, but that appellant had
    waived privilege when he provided his iPhone’s passcode to police.
    During appellant’s case-in-chief, counsel for appellant asked appellant to explain the
    notes found on his iPhone. Appellant stated that the note entitled “Attorney Client Privilege
    (Affair),” which detailed the victim’s activities, was made in order to document times at which
    she was busy and he, rather than the housekeeper or nanny, could have provided child care.
    Appellant also testified that he kept notes on the victim’s possible affairs in preparation for their
    divorce proceedings. He stated that he obtained the information from the victim’s Facebook
    page and also from his daughter’s iPhone.
    The Commonwealth did not mention the exhibit containing the iPhone notes in its initial
    closing argument. In appellant’s closing argument, counsel mentioned the notes, arguing that
    while the Commonwealth was characterizing them as evidence of “stalking,” appellant was
    merely collecting information useful to the divorce proceedings. He also argued that if appellant
    had been “following” the victim, he would have known that she ran on a secluded trail and that
    he would have had the opportunity to murder her there. The Commonwealth briefly referenced
    the notes in its rebuttal closing, arguing that the victim would not have committed suicide
    because her “old life was going to be over: [t]he fears, the control, the stalking, the snooping
    into her phone calls, the snooping into her Facebook account, having her followed as [appellant]
    admitted that he did when she went on vacation.”
    - 22 -
    Discussion
    Appellant argues that that trial court erred by finding that he had waived the
    attorney-client privilege and in not granting a mistrial based upon the Commonwealth’s use of
    appellant’s attorney-client privileged communications which were “seized pursuant to a search
    warrant.”
    Virginia law recognizes that “[c]onfidential communications between attorney and client
    made because of that relationship and concerning the subject matter of the attorney’s
    employment ‘are privileged from disclosure, even for the purpose of administering justice.’”
    Commonwealth v. Edwards, 
    235 Va. 499
    , 508-09 (1988) (quoting Grant v. Harris, 
    116 Va. 642
    ,
    648 (1914)). The proponent of the privilege “has the burden to establish that the attorney-client
    relationship existed, that the communications under consideration are privileged, and that the
    privilege was not waived.” 
    Id. at 509.
    Based on the record, we need not decide the more complex question of whether the trial
    court erred in admitting the notes because any presumed error committed because of their
    admission is harmless.12
    “Virginia law requires that in all criminal cases in which the appellate court finds that
    error occurred in the trial court, it must consider whether the error was harmless.” Graves v.
    Commonwealth, 
    65 Va. App. 702
    , 711 (2016); see also Code § 8.01-678. “There are two distinct
    tests for determining harmless error. One applies when the claim involves constitutional error
    and the other when it involves non-constitutional error.” 
    Graves, 65 Va. App. at 711
    . In this
    case, appellant’s challenge to the admission of the notes involves a constitutional claim—that the
    12
    “As an appellate court, we seek ‘the best and narrowest ground available’ for our
    decision.” Harvey v. Commonwealth, 
    65 Va. App. 280
    , 285 n.2 (2015) (quoting Armstead v.
    Commonwealth, 
    56 Va. App. 569
    , 576 (2010)). With respect to this assignment of error, we
    conclude that our determination that the error, if any, was harmless constitutes the best and
    narrowest ground.
    - 23 -
    court’s finding of waiver was in error because appellant could not have consented to the search
    of his iPhone when the iPhone was seized pursuant to a search warrant.13 We acknowledge that
    this Court generally analyzes the admission of evidence and whether that evidence was protected
    by privilege under a non-constitutional harmless error standard. See Castillo v. Loudoun Cty.
    Dep’t of Family Servs., 
    68 Va. App. 547
    , 564 (2018). Here, however, because the admission of
    the notes involves both types of error, we analyze its admission under the more stringent
    constitutional standard, and find that any error in the admission of the notes was harmless even
    under this standard.
    The standard for constitutional harmless error is well settled. “When a federal
    constitutional error is involved, a reversal is required unless the reviewing court determines that
    the error is harmless beyond a reasonable doubt.” Pitt v. Commonwealth, 
    260 Va. 692
    , 695
    (2000); see also Commonwealth v. White, 
    293 Va. 411
    , 420 (2017). In order to determine
    whether the error was harmless beyond a reasonable doubt, we must ask “whether there is a
    reasonable possibility that the evidence complained of might have contributed to the conviction.”
    
    Pitt, 260 Va. at 695
    (quoting Chapman v. California, 
    386 U.S. 18
    , 23 (1967)). Further, in
    making the determination of whether constitutional error existed, the court must consider, among
    other factors, “the importance of the tainted evidence in the prosecution’s case, whether that
    evidence was cumulative, the presence or absence of evidence corroborating or contradicting the
    tainted evidence on material points, and the overall strength of the prosecution’s case.” Lilly v.
    Commonwealth, 
    258 Va. 548
    , 551 (1999).
    13
    We assume without deciding that appellant properly preserved a constitutional
    challenge on appeal, but note that appellant never filed a motion to suppress in relation to the
    iPhone, and the trial court stated that it was not making the finding regarding waiver on a
    “constitutional level” because that issue was not before it.
    - 24 -
    Here, we find that the notes had minimal, if any, importance to the Commonwealth’s
    case. Appellant himself testified to the activity set forth in the notes, admitting that he created
    the note detailing the victim’s activities in preparation for their divorce proceedings. Further, it
    was counsel for appellant who first raised the notes in closing argument, contending that if
    appellant truly had been stalking the victim, it would not have made sense for him to have killed
    her at her home rather than in the woods where she often ran alone. The Commonwealth
    mentioned the notes only in passing during its rebuttal closing, arguing that the victim was not
    likely to have committed suicide because her “old life”—including appellant’s “stalking” and
    “snooping into her Facebook account”—would soon be over once her divorce was final.
    Moreover, overwhelming evidence established appellant’s guilt, demonstrating the
    overall strength of the Commonwealth’s case. Three individuals—two friends of appellant and
    appellant’s adult son—identified appellant from security footage as the person who approached
    the victim’s home on the night of her death. Z.C., another of appellant’s sons, testified that he
    had seen his father in the victim’s home the night of the killing. Also, appellant’s DNA was
    identified from bloodstains found in the victim’s bedroom and on the victim’s sweatshirt, after
    appellant had been barred from the residence pursuant to a protective order for over a year.
    Further, several points of evidence refuted appellant’s theory that the victim committed suicide:
    the medical examiner testified that the victim was strangled and suffocated and that the manner
    in which the victim died was inconsistent with suicide; the victim had plans to travel and to
    engage in athletic activities; and a cadaver dog trained to alert to the odor of human
    decomposition and dried blood alerted to an area in the victim’s bedroom, as well to the
    bathroom where her body was found. Thus, based upon the record before us, we conclude that
    any error in admitting the notes found on appellant’s iPhone did not create a reasonable
    possibility that the evidence complained of might have contributed to appellant’s conviction.
    - 25 -
    Consequently, we hold that even if the trial court erred in admitting this evidence, that error was
    harmless beyond a reasonable doubt.
    D. Introduction of Cadaver Dog Evidence
    Appellant filed a pretrial motion to bar evidence of blood and cadaver dog searches and
    alerts, and the court heard the motion at a pretrial motions hearing.
    At this hearing, Rex Stockham, a special agent with the Evidence Response Team within
    the FBI’s Laboratory Division, was recognized as an expert in forensic K-9 operations.
    Stockham had written a number of papers on human scent evidence that had been peer reviewed
    and published. He was one of two supervisors of the division’s forensic K-9 program. He
    testified that victim recovery dogs, or “cadaver dogs,” were developed to address the FBI’s need
    to locate missing individuals. Stockham stated that cadaver dogs are trained to alert to the odor
    of decomposing human material and that they can alert to trace amounts and residual odors
    rather than physical substances.14 Stockham testified that the odor of human decomposition is
    “[v]ery” persistent over time.
    Stockham testified that he developed a cadaver dog program for the FBI starting in
    2005.15 While developing this program, he met Martin Grime, a National Homicide Search
    Advisor in the United Kingdom who worked with cadaver dogs. In 2010 or 2011, Grime started
    to work with the FBI to help develop its program. The program started seeing improved results
    after Grime’s involvement. Since the program’s establishment in 2005, Stockham had directed
    hundreds of crime scenes using cadaver dogs.
    14
    Stockham acknowledged on cross-examination that scientists do not know what
    specific chemicals comprise the odor of decomposition to which the dogs alert.
    15
    Stockham had previously worked with human scent evidence dogs, typically known as
    “tracking dogs.”
    - 26 -
    Stockham testified that the FBI had established a scientific working group, consisting of
    members of the academic community, the canine industry, and various international partners, to
    develop cadaver dog best practice certification assessment guidelines. He stated that all of the
    dogs in the FBI program met these guidelines and were required to pass an annual proficiency
    certification assessment. They were also given routine maintenance training to ensure that they
    maintained their skills. Stockham testified that some cadaver dogs failed out of the program
    because they were not proficient.
    Stockham explained that the first dog used in this case, Morse, was part of the FBI
    program and had come to the program already trained. He assessed Morse as “[v]ery proficient”
    prior to the search of the victim’s home. Morse, he noted, did not “make a lot of mistakes.”
    Keela, the second dog used in the search, was a human blood detection dog that was trained to
    detect the odor of human blood, but not its residual odor. Stockham testified that her proficiency
    was “exceptional.” Stockham had never witnessed a situation involving Morse or Keela in
    which their handler, Grime, was able to cue them to alert to something that was not there.
    Martin Grime also testified at the hearing, stating that he worked as a consultant with the
    Evidence Response Team. Previously, Grime had worked in British law enforcement for thirty
    years, including as an instructor at a regional police dog training school. He began cadaver dog
    detection work in 2000, and soon initiated a victim recovery dog training program for British law
    enforcement. Grime was qualified as an expert in human remains detection and training victim
    recovery dogs.
    Grime brought Morse and Keela with him when he started his consulting work with the
    FBI. Both were adult dogs at the time. Grime had trained Morse from a puppy to certification
    and continued to train him regularly. He explained that Morse was first trained using scent pads
    which had been applied to corpses. Morse was then trained in “operational” scenarios, including
    - 27 -
    training using known graves. At the time of the search of the victim’s home, Morse was certified
    by the FBI as a proficient cadaver dog. Grime testified that while proficiency certifications
    occurred annually, Stockham also conducted occasional “surprise proficiency test[s].” Morse
    had never failed a proficiency test conducted by the FBI at the time the victim’s home was
    searched.
    The Commonwealth introduced into evidence Morse’s training records and his 2014 FBI
    certification. The records reflected that Morse participated in several training exercises from
    February 2014 through April 2014, all with “excellent” or “[v][ery] good” proficiency ratings.
    The search in this case was conducted on April 4, 2014. His yearly assessment, conducted on
    January 23, 2014, reflected that Morse was “very experienced” and “trusted.”
    Regarding the search of the victim’s residence, which occurred on April 4, 2014,
    Stockham testified that he directed the search with Morse and Keela. Grime was the dogs’
    handler. Stockham was told that the victim had been found hanging in a bathroom, but that
    investigators thought that the body previously had been “stashed” somewhere else in the house.
    The investigators did not tell Stockham where the body had been previously in the house.
    Stockham only told Grime that they had been asked to assist in a homicide case, and simply
    instructed him to “come in and run your dog.”
    When Morse entered the house, he was given a command to search. Without being
    directed toward the basement, Morse “broke” and went to that part of the home and alerted to the
    bathroom in the basement. This conduct indicated to Stockham that there was “enough odor
    [there] that it drew [Morse] in from that distance.” While searching the rest of the home, Morse
    - 28 -
    alerted to the area at the foot of the victim’s bed. Stockham testified that Morse would alert
    where he smelled the highest concentration of odor.16
    Both Stockham and Grime were questioned about the possibility of odor transference—
    meaning whether the odor of human decomposition could be transferred from its source to
    another object by contact, and then further transferred to additional objects by contact.
    Stockham testified that the odor of human decomposition can be transferred from a cadaver to
    clothing or to a person handling a body. He acknowledged that he wrote in his incident report
    from the search that human decomposition odor may be present in or on items associated with
    daily living, and as such, the dog’s positive final responses may or may not have significance.
    When asked whether it was possible that Morse’s alert at the foot of the victim’s bed “came from
    activities of daily living,” Stockham stated, “I don’t know what the alert was from.” He later
    clarified on re-direct that he did not know what combination of chemicals the dog was relying on
    to give the alert, but that the dog was trained to find the odor of human decomposition. Grime
    testified that transference of human decomposition odor, either directly or indirectly, happens
    “quite easily and readily.” He opined that such transference was unlikely in this case because
    Morse only alerted in two locations; if the transference of odor had been caused by individuals
    moving through the house, the dog would have responded in more places.
    Following the hearing on the matter, the trial court issued an order denying appellant’s
    motion to bar evidence of blood and cadaver dog searches and alerts.17
    16
    Keela only alerted to the victim’s underwear drawer. Stockham noted that if there was
    menstrual blood on the underwear, Keela would alert to that, so he concluded that the alert on the
    drawer was “inconsequential.”
    17
    Appellant filed a motion to reconsider the admissibility of the cadaver dog evidence,
    and the court by order denied the motion to reconsider.
    - 29 -
    Both Stockham and Grime testified at trial in the same manner as they did at the pretrial
    motion hearing. In addition, both opined that “to a reasonable degree of scientific certainty,”
    Morse alerted to human decomposition at the foot of the victim’s bed.
    Discussion
    On appeal, appellant alleges that the trial court erred by admitting cadaver dog evidence
    because the evidence was not based on reliable scientific evidence or methods. 18 Appellant
    argues that the science underlying cadaver dog evidence is not reliable, and thus the trial court
    erred in admitting testimony relating to this evidence.
    We recognize that the admission of cadaver dog evidence is an issue of first impression
    in Virginia. However, relying on prior Virginia case law involving dog scent evidence, we
    conclude that we need not consider whether the science underlying the expert testimony
    concerning the cadaver dog evidence was reliable. Instead, we need only determine whether a
    proper foundation was laid for the admission of the evidence.
    In Spencer v. Commonwealth, 
    240 Va. 78
    , 97 (1990), our Supreme Court held that
    “[w]hen scientific evidence is offered, the [trial] court must make a threshold finding of fact with
    respect to the reliability of the scientific method offered, unless it is of a kind so familiar and
    accepted as to require no foundation to establish the fundamental reliability of the system.”
    Appellant argues that, pursuant to Spencer, the science underlying the expert cadaver dog
    testimony was not sufficiently reliable to be admissible. This same argument was made and
    rejected by this Court in the context of dog trailing evidence in Pelletier v. Commonwealth, 
    42 Va. App. 406
    (2004). In Pelletier, defendant argued that the Commonwealth failed to lay a
    18
    In addition, appellant argues under this assignment of error that the court applied an
    incorrect legal standard by placing the burden of proving the reliability of proffered scientific
    evidence on appellant. However, appellant did not raise this argument before the trial court;
    thus, we do not address it on appeal. See Rule 5A:18.
    - 30 -
    proper foundation for the admission of dog trailing evidence because the detective, called as an
    expert witness, could not scientifically explain the dog’s ability to discern the age of the trail and
    the direction in which the suspect traveled. 
    Id. at 417.
    This Court, rejecting this contention,
    explained that a prior dog trailing case from our Supreme Court, Epperly v. Commonwealth, 
    224 Va. 214
    (1982), did not “hold that dog tracking evidence must be explained scientifically before
    it can be admitted.” 
    Pelletier, 42 Va. App. at 419
    . We further stated as follows:
    Nevertheless, [defendant] contends that all expert testimony,
    whether it involves a scientific field, such as DNA analysis, or a
    highly specialized one, such as dog trailing or tracking, must be
    preceded by adequate scientific explanation that establishes its
    reliability. The courts of the Commonwealth, however, routinely
    allow expert testimony without a scientific foundation where “‘the
    jury . . . is confronted with issues’ that ‘cannot be determined
    intelligently merely from the deductions made and inferences
    drawn on the basis of ordinary knowledge, common sense, and
    practical experience.’” Schooler [v. Commonwealth], 14 Va. App.
    [418,] 420 [(1992)] (quoting Compton [v. Commonwealth], 219
    Va. [716,] 726 [(1979)]). . . . Likewise, a clear majority of states
    allows dog tracking evidence despite the fact that the dog’s ability
    cannot be scientifically explained.
    Many courts have ruled that . . . evidence of
    tracking a defendant is admissible, subject to
    establishment of a proper foundation. Even though
    the precise scientific basis for dog tracking remains
    uncertain, it is clear that such dogs can be trained to
    almost unerringly follow a trail left by particular
    persons even after some time has passed, and even
    though the trail has crossed the scent left by other
    persons.
    Jay M. Zitter, Annotation, Evidence of Trailing by Dogs in
    Criminal Cases, 
    81 A.L.R. 5th 563
    (2003).
    Epperly does not require that a scientific foundation be laid
    for the admission of dog trailing evidence. Rather, it holds that
    dog trailing evidence must be empirically shown to be reliable
    from experience. The showing of reliability is met by testimony
    from the handler establishing that he “was qualified to work with
    the dog and to interpret its responses” and that “the dog was a
    - 31 -
    sufficiently trained and proven tracker of human scent.” 
    Epperly, 224 Va. at 233
    .
    
    Id. at 419-20.
    We conclude that this same analysis applies to the admission of cadaver dog evidence.
    Cadaver dog evidence does not require a scientific foundation for its admission; rather, the
    cadaver dog evidence must be shown to be reliable from experience, which can be met through
    the testimony of the cadaver dog handler. Thus, as with dog trailing evidence in Pelletier,
    cadaver dog evidence may be admitted without a showing of its precise scientific basis.19
    Appellant also argues that, due to its lack of scientific reliability, the cadaver dog
    evidence did not constitute proper expert opinion testimony.
    “It is well established that the admissibility of expert testimony is within the sound
    discretion of the trial court, and that court’s decision will not be disturbed absent an abuse of
    discretion.” Schmuhl v. Commonwealth, 
    69 Va. App. 281
    , 299 (2018) (quoting Patterson v.
    Commonwealth, 
    3 Va. App. 1
    , 11 (1986)). “The sole purpose of permitting expert testimony is
    to assist the trier of fact to understand the evidence presented or to determine a fact in issue.”
    Velazquez v. Commonwealth, 
    263 Va. 95
    , 103 (2002). In a Virginia criminal proceeding, a
    qualified expert witness is allowed to testify if “the subject matter is beyond the knowledge and
    19
    The Michigan Court of Appeals came to a similar conclusion in People v. Lane, 
    862 N.W.2d 446
    (Mich. Ct. App. 2014). In Lane, a case which involved the same cadaver dog,
    Morse, the Court of Appeals rejected defendant’s argument that cadaver dog evidence could not
    be admitted because chemical evidence could not corroborate whether there was human
    decomposition at the locations identified by the dog. 
    Id. at 457.
    In analyzing this argument
    under MRE 702, Michigan’s rule of evidence regarding the admission of expert opinion
    testimony on areas of specialized knowledge, the Court of Appeals held that a lack of scientific
    verification of the presence of a specific scent was not reason to exclude cadaver dog evidence in
    every case. 
    Id. at 457-48.
    Instead, the Michigan Court of Appeals found that the evidence could
    be admitted after a sufficient foundation was established that: “(1) the handler was qualified to
    use the dog, (2) the dog was trained and accurate in identifying human remains,
    (3) circumstantial evidence corroborates the dog’s identification, and (4) the evidence was not so
    stale or contaminated as to make it beyond the dog’s competency to identify it.” 
    Id. at 457.
                                                    - 32 -
    experience of ordinary persons, such that the jury needs expert opinion in order to comprehend
    the subject matter, form an intelligent opinion, and draw its conclusions.” Va. R. Evid.
    2:702(a)(ii). “[T]he trial judge must determine whether the subject matter of the testimony is
    beyond a lay person’s common knowledge and whether it will assist the trier of fact in
    understanding the evidence or in determining a fact in issue.” Utz v. Commonwealth, 
    28 Va. App. 411
    , 423 (1998). A challenge to an “expert’s measurements, methods and
    determinations . . . does not render inadmissible expert opinion based on those measurements,
    methods and computations” but goes to the “weight of the evidence,” raising “factual questions
    to be determined by the jury.” Hubbard v. Commonwealth, 
    12 Va. App. 250
    , 255 (1991).
    Provided that certain foundational requirements are met, Virginia courts have allowed the
    admission of expert testimony regarding dog tracking and narcotics detection dog evidence. As
    noted above, in Epperly, the Supreme Court examined tracking dog evidence. In permitting the
    admission of dog tracking evidence, the Court stated as follows:
    We hold that dog-tracking evidence is admissible in a criminal
    case after a proper foundation has been laid to show that the
    handler was qualified to work with the dog and to interpret its
    responses, that the dog was a sufficiently trained and proven
    tracker of human scent, that the dog was placed on the trail where
    circumstances indicated that the guilty party had been, and that the
    trail had not become so stale or contaminated as to be beyond the
    dog’s tracking 
    capabilities. 224 Va. at 233
    .
    In Hetmeyer v. Commonwealth, 
    19 Va. App. 103
    (1994), defendant challenged the
    admission of testimony relating to a drug dog’s reaction to the odor of narcotics. The dog had
    been presented with a “lineup” of five envelopes and alerted to one which contained cash that
    had been taken from defendant. 
    Id. at 107-08.
    This Court, utilizing Epperly in its analysis,
    found that the trial court did not err in the admission of this evidence:
    - 33 -
    Just as the dog’s “alert” on Epperly’s scent and the related pursuit
    of it to his residence were admissible as substantive evidence in
    that prosecution, we hold that expert testimony with respect to a
    dog’s reaction to the odor of narcotics is admissible when
    supported by a proper foundation. Such foundation must establish
    the appropriate training and reliability of the dog in the detection
    of specific drugs by odor and the witness handler’s expertise in
    interpreting the dog’s behavior, together with circumstances
    conducive to a dependable scent identification by the animal and a
    credible evaluation of its related behavior.
    
    Id. at 109-10.
    Epperly and Hetmeyer guide our analysis, establishing that expert testimony regarding
    cadaver dog evidence is admissible, as long as a proper foundation has been laid. In the context
    of cadaver dog evidence, we hold that expert testimony relating to a dog’s reaction to the odor of
    human decomposition is admissible after a proper foundation has been laid to show that the
    handler was qualified to work with the dog and to interpret its responses, that the dog was
    sufficiently trained in the detection of human decomposition odor, and that the circumstances
    surrounding the identification were conducive to a dependable scent identification by the animal.
    In the instant case, we conclude that these foundational requirements for the admission of
    the cadaver dog evidence were met.
    First, we find that the record contains evidence that Grime was qualified to work with
    Morse and to interpret his responses. Grime was qualified at trial as an expert in human remains
    detection and the training of victim recovery dogs. He described his past experience, including
    his creation of a cadaver dog training program in the United Kingdom. Grime had trained Morse
    from a puppy to certification and regularly conducted training with him. Stockham had never
    witnessed a situation involving Morse where Grime was able to cue the dog to alert to something
    that was not there.
    The record also includes evidence that Morse was sufficiently trained in detecting the
    odor of human decomposition. Grime explained that Morse was first trained using scent pads
    - 34 -
    which had been applied to corpses, and then trained in “operational” scenarios, including training
    with known graves. Morse’s training records reflect that the dog participated in several training
    exercises from February 2014 through April 2014, the month of the search of the victim’s
    residence, and that Morse received all “excellent” or “[v][ery] good” proficiency ratings. His
    yearly assessment reflected that Morse was “very experienced” and “trusted.” In addition,
    Stockham opined that Morse, in the period leading up to the search at issue, was “[v]ery
    proficient.”
    Finally, the record includes evidence showing that the circumstances surrounding the
    identification were conducive to a dependable scent identification by Morse. The search of the
    victim’s residence with Morse was conducted fourteen days after the discovery of the victim’s
    body, and Stockham testified that the odor of human decomposition is “very persistent” over
    time. Prior to the search, Stockham was told that the victim had been found hanging in a
    bathroom, but that investigators thought that her body had been previously “stashed” elsewhere
    in the house. Stockham did not know where the investigators thought the body had been, and he
    only told Grime that they were assisting with a homicide case before instructing him to “run his
    dog.”
    The trial court heard evidence as to the qualifications and training of the cadaver dog
    handler, the training of the dog itself, and the circumstances surrounding the search and the dog’s
    scent identification. This evidence established a proper foundation for the admission of the
    cadaver dog evidence. Therefore, we hold that the court did not err in admitting the expert
    testimony regarding the cadaver dog evidence.20
    20
    Appellant further argues that the admission of the cadaver dog evidence violated Rule
    2:703(b) and Rule 2:403. We find no merit in either argument.
    Rule 2:703(b) provides that “the opinion of an expert is generally admissible if it is based
    upon facts personally known or observed by the expert, or based upon facts in evidence.”
    Appellant argues the admission of the cadaver dog evidence violated this evidentiary rule
    - 35 -
    E. Prosecutorial Misconduct
    During closing argument, the Commonwealth’s attorney told the jury, “Please remember
    as you listen to them. You have to hold us to a standard, and that’s right. But hold them to a
    standard, too.” Counsel for appellant objected and moved for a mistrial, stating, “Judge, this is
    three times. It’s strike three; they’re out. We ask . . . [for] a mistrial. The Commonwealth has
    gone on this rant about high-priced attorneys and hired-gun attorneys, and whatever she said the
    first two times I objected. And now she tells this jury that we have a burden.” Counsel had
    previously objected to the Commonwealth’s attorney’s statements in closing that (1) the
    “greatest part” of the judicial system was the jury’s ability to decide the case according to the
    law, “no matter how many lawyers you have, no matter how many lawyers you pay to sit and --”
    and (2) “[n]o matter what you do to try to divert the jury’s attention away from the truth, no
    because Stockham and Grime “did not establish that the dogs were sufficiently reliable for
    identifying scent from a specific person, or determining that a specific person was ever in an
    exact location” and “could not identify what the dogs were alerting to.” Here, Grime personally
    conducted the search of the victim’s house with Morse and observed him alert in the basement
    bathroom and master bedroom. He opined that “to a reasonable degree of scientific certainty,”
    Morse alerted to human decomposition. His opinion was derived from his personal observation
    of Morse the day of the search and from his prior training with Morse. Thus, the evidence did
    not violate Rule 2:703(b).
    Rule 2:403(a) provides that relevant evidence may be excluded if “the probative value of
    the evidence is substantially outweighed by . . . its likelihood of confusing or misleading the trier
    of fact.” Appellant argues that the cadaver dog evidence improperly permitted the jury to
    speculate that there was an odor of human decomposition in the bedroom and that its source was
    the victim, and because there was no foundation for these conclusions, the jury was likely
    confused or misled. However, as noted above, the Commonwealth had provided a proper
    foundation for the expert testimony given by Stockham and Grime. They both opined that Morse
    alerted to the odor of human decomposition, and the jury was free to draw the reasonable
    inference that this odor derived from the victim.
    Appellant further contends that the admission of the cadaver dog evidence invited jury
    confusion and speculation because it was just as likely, if not more likely, that the dog falsely
    alerted, alerted due to the presence of menstrual blood, alerted to an odor transferred from the
    basement, or alerted to a source existing prior to March 19 or to a source created after March 20.
    However, appellant was given the opportunity to cross-examine, and did cross-examine, both
    experts on the variables that could produce a cadaver dog’s alert. The arguments relating to the
    likelihood that the dog falsely alerted or alerted to a presence other than the victim’s body went
    only to the weight of the evidence, not its admissibility.
    - 36 -
    matter what lies you tell when you testify, no matter who comes in here, whether they’re
    high-priced hand-picked --.” After appellant’s objection to the first statement, the court directed
    the Commonwealth to “concentrate on the evidence.” The court then overruled appellant’s
    objection to the Commonwealth’s second statement.
    In response to appellant’s motion for mistrial, the Commonwealth’s attorney said that she
    was not suggesting that appellant had a burden to carry. Instead, she meant that when he put on
    evidence, “it’s fair for the Commonwealth to suggest that this jury be suspect of this evidence,
    consider the source of the evidence, consider the price that was paid for the experts. That’s all
    I’m doing.” The court denied the motion for mistrial, telling counsel for appellant that
    [w]hen you first objected earlier, the [c]ourt redirected . . . [the
    Commonwealth’s attorney] to discuss the evidence. She has been
    discussing the evidence. Then the next time you objected, her
    whole statement hadn’t come out. And you said that she was
    talking about attorneys and she was referring to experts, which is
    fair argument. I am denying the motion for a mistrial.
    The court then instructed the jury that the Commonwealth must prove each element of the
    charges beyond a reasonable doubt and that there was no burden on appellant to produce any
    evidence.
    Later in closing argument, the Commonwealth’s attorney mentioned the alibi notice filed
    by appellant, noting that, “It . . . gives notice that he ‘may’ introduce evidence of an alibi.
    ‘May?’ Or may not?” Counsel for appellant objected and moved for a mistrial, arguing that the
    Commonwealth was improperly commenting on the alibi notice when “[i]t’s not a requirement
    that he presents an alibi defense” and that the comment “put a burden onto [appellant], to invoke
    his right to counsel and his right to interact with his counsel.” The court sustained the objection
    but denied the motion for mistrial, stating that there could be other “legitimate reasons, other
    than the ones that the Commonwealth would be suggesting, why an alibi defense would not be
    put on.” The court then directed the jury to disregard the Commonwealth’s attorney’s comment.
    - 37 -
    Discussion
    Appellant argues that the trial court erred in denying his motions for mistrial because the
    Commonwealth’s assertions during closing argument invited mistrial, caused questioning of the
    verdict’s validity, invited speculation, and improperly raised the ire and emotion of the jury.21
    “The decision whether to grant a mistrial motion is a matter submitted to the circuit
    court’s sound discretion.” Lewis v. Commonwealth, 
    269 Va. 209
    , 213 (2005).
    The trial court must make an initial factual determination, in the
    light of all the circumstances of the case, whether the defendant’s
    rights had been so indelibly prejudiced as to require a new trial.
    Unless we can say as a matter of law that this determination was
    wrong, it will not be disturbed on appeal. Unless the record shows
    the contrary, it is to be presumed that the jury followed an explicit
    cautionary instruction promptly given.
    LeVasseur v. Commonwealth, 
    225 Va. 564
    , 589 (1983).
    Appellant’s first mistrial motion was in response to the Commonwealth’s attorney’s
    statement, “Please remember as you listen to them. You have to hold us to a standard, and that’s
    right. But hold them to a standard, too.” When objecting to this statement, counsel for appellant
    21
    In addition, appellant challenges the trial court’s denial of his motion notwithstanding
    the verdict in which he argued that several additional statements made by the Commonwealth’s
    attorney during closing argument constituted prosecutorial misconduct. However, while
    appellant objected to many of these allegedly improper statements, he did not ask for a
    cautionary instruction on any and moved for a mistrial only twice during closing argument.
    Thus, the only statements before this Court are the statements challenged by appellant in his
    motions for mistrial. See Cheng v. Commonwealth, 
    240 Va. 26
    , 38 (1990) (“It is well-settled
    that errors assigned because of a prosecutor’s alleged improper comments or conduct during
    argument will not be considered on appeal unless an accused timely moves for a cautionary
    instruction or for a mistrial.”).
    Further, we reject appellant’s contention, made in his reply brief, that he preserved his
    argument regarding the other statements by challenging them in his motion for judgment
    notwithstanding the verdict. Virginia case law is clear that a party preserves a mistrial argument
    for appeal as long as the objection’s timing and the request for a mistrial do not significantly
    impair the trial court’s ability to take corrective action. See Angel v. Commonwealth, 
    281 Va. 248
    , 271-72 (2011). Here, appellant’s further arguments in support of a mistrial were made in a
    post-trial motion after the jury was dismissed. Because appellant failed to raise these issues until
    after his motion to set aside the verdict, the trial court’s ability to take corrective action was
    significantly impaired.
    - 38 -
    also referenced his objections to the Commonwealth’s remarks about the number of attorneys
    representing appellant and his “high-priced” experts. We find that none of the three challenged
    statements warranted a mistrial.
    Regarding the burden statement, the Commonwealth asked the jury to hold the defense
    “to a standard, too.” After denying the motion for mistrial, the court instructed the jury that the
    Commonwealth must prove each element of the charges beyond a reasonable doubt and that
    there is no burden on appellant to produce any evidence. Even if the Commonwealth’s
    attorney’s statement could be construed as an improper comment indicating there was a burden
    on appellant to produce evidence, the jury was given a prompt cautionary instruction, and there
    is no indication that this comment was so impressive that it caused prejudice warranting a new
    trial.
    As for the comments on appellant’s “high-priced hand-picked” experts, appellant argues
    that this statement was meant to indicate that his experts only provided the answers they were
    paid to provide and thus only served to inflame the jury’s passions against appellant. However,
    the trial court found that the statement regarding the experts was “fair argument,” and we agree.
    The Commonwealth’s attorney may properly “refer to the evidence and fair inferences from it”
    during closing argument to a jury. Martinez v. Commonwealth, 
    10 Va. App. 664
    , 672 (1990)
    (quoting Timmons v. Commonwealth, 
    204 Va. 205
    , 217 (1963)), aff’d as modified, 
    241 Va. 557
    (1991). “Whether the words used were prejudicial must be judged by a review of the totality of
    the evidence.” Fain v. Commonwealth, 
    7 Va. App. 626
    , 629 (1989). On cross-examination, the
    Commonwealth’s attorney had elicited testimony from appellant’s experts on how much they
    had been paid for their involvement in the case. This line of questioning was proper because the
    Commonwealth was entitled to attempt to persuade the jury that bias existed on the part of the
    experts. “The bias of a witness, like prejudice and relationship, is not a collateral matter. The
    - 39 -
    bias of a witness is always a relevant subject of inquiry when confined to ascertaining previous
    relationship, feeling and conduct of the witness.” Henson v. Commonwealth, 
    165 Va. 821
    ,
    825-26 (1936); see also Henning v. Thomas, 
    235 Va. 181
    , 187 (1988) (finding error in a medical
    negligence case when the trial court refused defendants’ counsel’s request to cross-examine
    plaintiff’s expert witness about how he became involved in the case and allowed only the
    question of whether the witness was being paid to give his testimony). Therefore, the fact that
    the experts that testified in appellant’s defense were paid was a fact in evidence and constituted a
    proper subject for closing argument.
    Appellant also challenges the Commonwealth’s attorney’s comment that the “greatest
    part” of the judicial system was the jury’s ability to decide the case according to the law, “no
    matter how many lawyers you have, no matter how many lawyers you pay to sit . . . ,” arguing
    that this statement was meant to denigrate his counsel and inflame the jury’s passions against
    him. Here, we find that the Commonwealth’s singular reference to the fact that appellant had a
    number of attorneys representing him, while not a proper subject for closing argument as it did
    not refer to the evidence or fair inferences to be drawn from the evidence, was not so prejudicial
    as to likely inflame the passions of the jury. In addition, the trial court noted that the
    Commonwealth’s attorney refrained from discussing appellant’s counsel after being so directed
    by the court. Under such circumstances, we cannot say that the Commonwealth’s isolated
    reference to appellant’s team of attorneys during closing argument “so indelibly prejudiced” him
    that it necessitated a mistrial. 
    LeVasseur, 225 Va. at 589
    . Thus, we find that the trial court did
    not err in denying appellant’s first motion for mistrial based upon the Commonwealth’s
    statements regarding a burden, appellant’s experts, and appellant’s attorneys.
    We also find that the court did not err in denying appellant’s second mistrial motion
    which challenged the Commonwealth’s attorney’s statement regarding his alibi notice.
    - 40 -
    Appellant challenged the Commonwealth’s statement to the jury that appellant’s alibi notice
    “gives notice that he ‘may’ introduce evidence of an alibi. ‘May?’ Or may not?” The court
    sustained appellant’s objection to the statement but denied his motion for mistrial, and then
    directed the jury to disregard the challenged statement. Although the Commonwealth’s
    statement was an attempt to indicate that appellant was unsure if he was going to introduce an
    alibi defense because he did not have one, the court promptly instructed the jury to disregard the
    Commonwealth’s statement. We find that any implication from the Commonwealth’s statement
    regarding the alibi notice was not so prejudicial that it could not be cured by the cautionary
    instruction.22
    Because we find that the challenged statements in both mistrial motions did not create
    indelible prejudice against appellant as to require a new trial, we conclude that the trial court did
    not abuse its discretion in denying both motions for mistrial.
    F. Testimony via Two-Way Closed-Circuit Television
    Prior to trial, the Commonwealth filed a motion for the use of two-way closed-circuit
    television for the testimony of Z.C., pursuant to Code § 18.2-67.9. At a hearing on the motion,
    Mary Spooner, a licensed clinical social worker, was qualified as an expert in the field of trauma
    specialization. She testified that she had been treating Z.C. since April 2014, the month after the
    victim’s death. Her therapy with Z.C. was focused on helping him resolve the grief and loss
    surrounding the traumatic nature of his mother’s death. It was reported to Spooner that Z.C. had
    displayed aggressive behaviors and experienced bed wetting episodes before and after visitation
    with appellant. She testified that Z.C. found it difficult to communicate about the events
    22
    We acknowledge that in this case, appellant’s notice of alibi was admitted into
    evidence. Despite being in evidence, the Commonwealth’s statement regarding the alibi notice
    was not a proper subject for closing argument because it suggested that appellant had a burden to
    produce evidence on his behalf.
    - 41 -
    surrounding the victim’s death, and opined that this difficulty was because Z.C. was sensitive
    and it was hard for him to tolerate uncomfortable feelings. She further opined that Z.C. would
    suffer “severe emotional trauma” from testifying in open court. Spooner based this opinion on
    her
    experience with him about tolerating his difficult emotions. He is
    a very sensitive little boy. He will be sensitive to the emotions of
    everyone. Court is a difficult place to be testifying for adults let
    alone a little boy who is incredibly sensitive and he doesn’t tolerate
    emotional discomfort well and he’s been through a lot already. He
    still misses his mother a lot.
    She also stated that in her opinion, the likelihood that Z.C. would experience severe emotional
    trauma would be lessened if he were allowed to testify via closed-circuit television.
    On cross-examination, Spooner was asked if the court limiting the courtroom to only the
    attorneys, jurors, and appellant would “help” Z.C. in testifying. She replied that “it would be
    hard for [Z.C.] to testify in front of a parent because he’s very sensitive.” Counsel for appellant
    then asked Spooner, “if [Z.C.] was told that he had to come in and testify and that his dad was
    going to be on the other side of the courtroom and he was going to be asked questions and to
    listen carefully and to answer the questions, he could do that, couldn’t he?” Spooner replied, “I
    don’t know that he could.” On rebuttal, the Commonwealth’s attorney asked Spooner what was
    the basis of her opinion that “there is a substantial likelihood that testifying in open court
    especially in front of [appellant], his father, would cause [Z.C.] severe emotional trauma?”
    Spooner replied that she had met with Z.C. on a regular basis for two years and “gotten to know
    him[,] which is my job to understand children and their treatment process[,] and based on my
    experience with [Z.C.] it is my opinion that having to testify in open court would be significantly
    and severely traumatizing to him emotionally.”
    After hearing argument, the court granted the Commonwealth’s motion.
    - 42 -
    Discussion
    Appellant contends that the trial court erred in allowing Z.C. to testify via two-way
    closed-circuit television. He argues that Code § 18.2–67.9 is unconstitutional and that the trial
    court erred in applying the requirements of Maryland v. Craig, 
    497 U.S. 836
    (1990).
    1. The Constitutionality of Code § 18.2-67.9
    “In assessing the constitutionality of a statute, we must presume that the legislative action
    is valid. The burden is on the challenger to prove the alleged constitutional defect.” Woolfolk v.
    Commonwealth, 
    18 Va. App. 840
    , 848 (1994) (quoting Perkins v. Commonwealth, 
    12 Va. App. 7
    , 14 (1991)). “Every act of the legislature is presumed to be constitutional, and the Constitution
    is to be given a liberal construction so as to sustain the enactment in question, if practicable.”
    Moses v. Commonwealth, 
    27 Va. App. 293
    , 298 (1998) (quoting Bosang v. Iron Belt Bldg. &
    Loan Ass’n, 
    96 Va. 119
    , 123 (1898)). “When the trial court rules on the constitutionality of a
    statute, we review such decisions de novo.” Johnson v. Commonwealth, 
    56 Va. App. 244
    , 248
    (2010).
    Appellant first argues that Code § 18.2-67.9 is unconstitutional because the United States
    Supreme Court decision allowing the use of closed-circuit television, Maryland v. Craig, 
    497 U.S. 836
    (1990), was overruled by Crawford v. Washington, 
    541 U.S. 36
    (2004). Our Court
    rejected this same argument in Roadcap v. Commonwealth, 
    50 Va. App. 732
    (2007). In
    Roadcap, we stated as follows:
    [Appellant] nonetheless suggests we “make new law” (his
    expression) by reexamining the underlying logic of Craig in light
    of newer, but distinguishable, decisions like Crawford . . . which
    he claims recognizes a more robust application of confrontation
    clause rights. We decline the invitation. As nearly all courts and
    commentators have agreed, Crawford did not overrule Craig.
    Whether it could have or should have, we do not say, and it is not
    our place to predict whether any of Crawford’s progeny will do so.
    “When a precedent of the Supreme Court has direct application in
    a case, we are not at liberty to ignore that precedent in favor of
    - 43 -
    other Supreme Court decisions employing a similar analysis in a
    different factual and legal context.” Johnson v. Commonwealth,
    
    267 Va. 53
    , 76 (2004) (citation omitted). Lower courts must
    “follow the case which directly controls,” leaving to the Supreme
    Court the sole “prerogative of overruling its own decisions.” 
    Id. (citation omitted);
    see also United States v. Hatter, 
    532 U.S. 557
    ,
    567 (2001); State Oil Co. v. Khan, 
    522 U.S. 3
    , 20 (1997) (stating
    “it is this Court’s prerogative alone to overrule one of its
    precedents”). The holding as well as the ratio decidendi of Craig,
    therefore, stands as binding authority.
    
    Id. at 742-43
    (footnote omitted).
    This panel is bound by the holding in Roadcap. See Startin v.Commonwealth, 
    56 Va. App. 26
    , 39 n.3 (2010) (en banc) (noting that a holding by one panel of this Court “bind[s]
    all other three-judge panels under the interpanel accord doctrine”). Thus, appellant’s argument
    that Code § 18.2-67.9 is unconstitutional due to the holding of Crawford fails.
    Appellant further argues that Code § 18.2-67.9 is unconstitutional because the statute is
    broader in scope than the statute examined in Craig and therefore its application in this case
    violated his confrontation right under the Sixth Amendment.
    In Craig, the Supreme Court upheld a Maryland statute permitting child abuse victims to
    testify from outside the courtroom through the use of one-way closed-circuit 
    television. 497 U.S. at 841
    . The Supreme Court declared that, while “‘the Confrontation Clause reflects a
    preference for face-to-face confrontation,’” defendants do not have an “absolute right to a
    face-to-face meeting with witnesses against them at trial.” 
    Id. at 844,
    849 (quoting Ohio v.
    Roberts, 
    448 U.S. 56
    , 63 (1980)). However, the Court cautioned that while not absolute, “the
    face-to-face confrontation requirement” may not “easily be dispensed with.” 
    Id. at 850.
    The
    Court held that “a defendant’s right to confront accusatory witnesses may be satisfied absent a
    physical, face-to-face confrontation at trial only where” (1) the “denial of such confrontation is
    necessary to further an important public policy,” and (2) “the reliability of the testimony is
    otherwise assured.” 
    Id. - 44
    -
    We acknowledge that the statute at issue, Code § 18.2-67.9, is broader in scope than the
    Maryland statute found constitutional in Craig. The Maryland statute permitted the use of
    closed-circuit television for a child victim’s testimony in a child abuse case. 
    Id. at 840
    n.1. In
    contrast, Code § 18.2-67.9 permits the use of closed-circuit television for an “alleged victim or a
    child witness” in criminal proceedings “involving an alleged offense against a child, relating to a
    violation of the laws pertaining to kidnapping . . . , criminal sexual assault . . . , or family
    offenses pursuant to Article 4 . . . of Chapter 8 of Title 18.2, or involving an alleged murder of a
    person of any age.” Noting the differences between the statutes, appellant argues that Craig only
    allowed for closed-circuit television testimony for victims of child abuse and that the state had a
    unique and compelling interest in protecting children under those specific circumstances. Thus,
    Craig’s reasoning may not be extended to protect other interests.
    We are unpersuaded by this argument. While the Virginia statute is broader than the
    specific statute addressed in Craig, we do not find that the language of Craig itself limits its
    holding to child abuse cases. At no point in Craig did the Supreme Court indicate that it was
    establishing a definite limitation as to when the Confrontation Clause permits testimony by
    closed-circuit television. Rather, we view Craig as allowing a necessity-based exception for
    face-to-face, in-courtroom confrontation where the witness’ inability to testify in court invokes a
    state’s interest in protecting the witness, and do not regard its specific language as limiting this
    reasoning only to the protection of a state’s interest in protecting child abuse victims. See Horn
    v. Quarterman, 
    508 F.3d 306
    , 319-20 (5th Cir. 2007) (“Craig’s references to ‘an important public
    policy’ and ‘an important state interest,’ are reasonably read to suggest a general rule not limited
    to protecting child victims of sexual offenses from the trauma of testifying in a defendant’s
    presence.” (citation omitted) (quoting 
    Craig, 497 U.S. at 850
    , 852)).
    - 45 -
    Here, the General Assembly has indicated by its enactment of Code § 18.2-67.9 its public
    policy interest in reducing trauma for child witnesses involved not only in child abuse, but in a
    range of serious crimes. This statute represents the legislature’s judgment as to the
    circumstances that best accommodate both the public’s interest in protecting child witnesses and
    a defendant’s right to confront adverse witnesses. Although this statute is broader in scope than
    the statute examined in Craig, nothing in the language of Craig itself indicates that Code
    § 18.2-67.9 is unconstitutional because of its broader provisions. Therefore, we reject
    appellant’s challenge to the constitutionality of Code § 18.2-67.9.
    2. The Specific Requirements of Craig
    Appellant also argues that the trial court erred in allowing the use of two-way
    closed-circuit television because the requirements for the use of closed-circuit television
    mandated by Craig were not present in this case.
    In Craig, the Supreme Court held that a trial court’s finding that an alternate method of
    taking testimony must be case-specific, based upon specific factual findings that: (1) the
    alternate method “is necessary to protect the welfare of the particular child witness who seeks to
    testify”; (2) the “child witness would be traumatized, not by the courtroom generally, but by the
    presence of the defendant”; and (3) “the emotional distress suffered by the child witness in the
    presence of the defendant is more than de minimis, i.e., more than ‘mere nervousness or
    excitement or some reluctance to 
    testify.’” 497 U.S. at 855-56
    (quoting Wildermuth v. State,
    
    530 A.2d 275
    , 289 (Md. 1987)).
    In the instant case, appellant alleges that the trial court erred by not making the specific
    findings that Z.C. would be “traumatized, not by the courtroom generally, but by the presence of
    the defendant” and that his emotional distress would be more than “mere nervousness or
    excitement or reluctance to testify.”
    - 46 -
    However, it is clear from the record that the trial court did in fact make these specific
    findings, as is mandated under Code § 18.2-67.9. See Code § 18.2-67.9 (testimony may be taken
    by closed-circuit television if the court “finds that the child is unavailable to testify in open court
    in the presence of the defendant, the jury, the judge, and the public for any of the following
    reasons,” including that “the child will suffer severe emotional trauma from so testifying”). In
    granting the Commonwealth’s motion at the pretrial hearing, the court explained that it did so
    because Spooner’s testimony demonstrated that there was a “substantial likelihood” that Z.C.
    would “suffer severe emotional trauma from testifying in open court due to the presence of
    [appellant].” In addition, the court found that the potential “severe emotional trauma is clearly
    more than de minimis,” and “more than on the level of nervousness or excitement.”
    Moreover, we find no error in the court’s determinations. “When reviewing the decisions
    of a trial court, we give great weight to the court’s factual findings, which will not be disturbed
    on appeal unless plainly wrong or without evidence to support them.” Parrish v.
    Commonwealth, 
    38 Va. App. 607
    , 613 (2002). In addition, “we consider all the evidence, and
    any reasonable inferences fairly deducible therefrom, in the light most favorable to the party that
    prevailed at trial, which is the Commonwealth in this case.” Toliver v. Commonwealth, 
    38 Va. App. 27
    , 31 (2002) (quoting Byers v. Commonwealth, 
    37 Va. App. 174
    , 179 (2001)).
    In this case, evidence adduced at trial supported the finding that Z.C. would be
    traumatized, not by the courtroom generally, but by the courtroom presence of appellant. A
    month after the victim’s death, Spooner began treating Z.C., helping him to resolve grief he
    experienced due to the traumatic nature of his mother’s death. Spooner was informed that Z.C.
    had displayed aggressive behaviors and experienced bed wetting episodes before and after
    visitation with appellant. She was asked if limiting the courtroom to only the attorneys, jurors,
    and appellant would “help” Z.C. in testifying, and she replied that “it would be hard for him to
    - 47 -
    testify in front of a parent because he’s very sensitive.” Clearly, the only parent Spooner could
    have been referencing regarding Z.C.’s inability to testify was appellant. Further, when asked
    whether Z.C., if he “was told that he had to come in and testify and that [appellant] was going to
    be on the other side of the courtroom and he was going to be asked questions and [had] to listen
    carefully and to answer the questions, . . . [he] could do that,” Spooner replied, “I don’t know
    that he could.” Z.C.’s behavior surrounding his visitations with appellant and Spooner’s
    testimony about Z.C.’s ability to testify in front of appellant provided sufficient support for the
    trial court’s finding that the child would be traumatized, not by the courtroom generally, but by
    the presence of appellant.
    Spooner’s testimony also established that the trial court did not err in its finding that
    Z.C’s emotional distress would rise to more than mere nervousness or excitement or some
    reluctance to testify. She opined that there was a substantial likelihood that Z.C. would suffer
    severe emotional trauma from testifying in open court. Spooner based her opinion on Z.C.’s
    “incredibly sensitive” nature and his inability to tolerate his “difficult emotions.” She also
    pointed to the emotional discomfort he had already experienced due to the victim’s death and the
    difficulty he had in discussing the events surrounding her death. This testimony provided a
    sufficient basis for the trial court to determine that Z.C.’s emotional distress was more than mere
    nervousness or reluctance to testify, and thus we cannot say that this finding was plainly wrong
    or without evidence.
    Here, the trial court found Z.C. would be traumatized, not by the courtroom generally,
    but by the presence of the defendant and that his emotional distress would be more than mere
    nervousness or excitement or reluctance to testify. The record supports these findings; therefore,
    we reject appellant’s argument that the trial court erred in its application of Craig in the instant
    case.
    - 48 -
    G. Testimony Regarding Appellant’s Silence
    Prior to trial, appellant filed a motion to bar the Commonwealth from eliciting testimony
    from Detective McCaffrey that appellant had no response when McCaffrey informed him of the
    victim’s death. Appellant argued that any evidence of his lack of response to McCaffrey’s
    questioning violated his Fifth Amendment right under the United States Constitution and Article
    I, § 8 of the Virginia Constitution. Appellant also alleged that the evidence was inadmissible
    because it was ambiguous and would result in improper speculation by the jury.
    The court denied the motion to bar the Commonwealth’s introduction of testimony that
    appellant displayed no emotion when he was told his wife had died.
    At trial, Detective McCaffrey testified that he arrived at the victim’s residence at about
    9:55 a.m. the morning of the victim’s death. He stated that one of his duties as lead detective
    was to provide death notices to the victim’s family. Someone provided McCaffrey with
    appellant’s phone number, and he called appellant and informed him that he wanted to speak
    with him about the victim’s “disappearance.” Appellant stated that he had his youngest son with
    him and that he would arrange for someone to care for the child before speaking with the
    detective. McCaffrey told appellant that he wanted to speak with him immediately because it
    was important, and appellant replied that he would “get back to” McCaffrey and hung up. At
    that point, McCaffrey went to appellant’s home and gave him a “death notification” regarding
    the victim. McCaffrey testified that appellant displayed no emotion in response to this
    information. McCaffrey also testified that appellant did not ask questions as to how the victim
    had died.
    Discussion
    Appellant argues that the trial court erred by permitting testimony regarding appellant’s
    silence and lack of emotion when McCaffrey informed him of the victim’s death. Appellant
    - 49 -
    contends that this testimony had no probative value and only invited jury speculation and that
    admitting evidence of appellant’s lack of response violated his Fifth Amendment right to remain
    silent.
    In the instant case, we need not decide whether the trial court erred in admitting the
    testimony regarding appellant’s response to being informed of the victim’s death because we
    conclude that any potential error was harmless.23
    Appellant challenges the admission of McCaffrey’s testimony on the evidentiary basis
    that it had no probative value and on the constitutional basis that it violated his Fifth Amendment
    right to silence. Because appellant’s challenge to the admission of the testimony involves both
    constitutional and non-constitutional harmless error, we analyze its admission under the more
    stringent constitutional standard, finding that any error in the testimony’s admission was
    harmless even under this standard.
    “When a federal constitutional error is involved, a reversal is required unless the
    reviewing court determines that the error is harmless beyond a reasonable doubt.” 
    Pitt, 260 Va. at 695
    . In order to determine whether the error was harmless beyond a reasonable doubt, we
    must ask “whether there is a reasonable possibility that the evidence complained of might have
    contributed to the conviction.” 
    Id. (quoting Chapman,
    386 U.S. at 23). Further, in making the
    determination of whether constitutional error existed, the court must consider, among other
    factors, “the importance of the tainted evidence in the prosecution’s case, whether that evidence
    was cumulative, the presence or absence of evidence corroborating or contradicting the tainted
    23
    We do not address the issues of whether evidence of appellant’s pre-custodial silence
    was too speculative to be admitted or violated his Fifth Amendment rights because “[a]s an
    appellate court, we seek ‘the best and narrowest ground available’ for our decision.” 
    Harvey, 65 Va. App. at 285
    n.2 (quoting 
    Armstead, 56 Va. App. at 576
    ). With respect to this assignment of
    error, we conclude that our determination that the error, if any, was harmless constitutes the best
    and narrowest ground.
    - 50 -
    evidence on material points, and the overall strength of the prosecution’s case.” 
    Lilly, 258 Va. at 551
    .
    Examining these factors in the present case, we first emphasize the relative lack of
    importance of McCaffrey’s testimony to the Commonwealth’s case. Here, McCaffrey testified
    that, after providing appellant with the information that the victim had died, appellant displayed
    no emotion in response and did not any ask questions as to how the victim had died. Any
    inference the jury could have drawn from these facts would have been inherently ambiguous.
    Based on McCaffrey’s testimony, the jury reasonably could have inferred that appellant’s
    reaction indicated he was not surprised to hear that the victim was dead, and further inferred that
    this was because he had in fact murdered her. However, the jury just as reasonably could have
    inferred that appellant’s reaction was motivated by other factors. Some individuals might
    display no emotion when they experience extreme shock or surprise.24 McCaffrey did not testify
    as to how other individuals to whom he gave death notifications in the past had reacted, and
    therefore the jury did not have a rational basis for concluding whether appellant’s reaction was
    typical or atypical. Thus, because any inference the jury might have drawn from McCaffrey’s
    testimony would have been inherently ambiguous, the evidence had little probative value.25
    Further, as 
    discussed supra
    in Part II.C, the record contains substantial evidence
    supporting appellant’s conviction. Two of appellant’s friends and his adult son identified
    appellant from security footage as the person who approached the victim’s home on the night of
    her death. Z.C., another of appellant’s sons, testified that he had seen appellant in the victim’s
    24
    This assertion is supported by appellant’s own testimony. In testifying on his behalf,
    appellant stated that when he received the information that the victim had died, he was
    “shocked,” “floored,” and “paralyzed.”
    25
    In addition, McCaffrey’s testimony was not mentioned by the Commonwealth in its
    closing argument, in which it emphasized certain aspects of the evidence to the jury in its effort
    to obtain a conviction.
    - 51 -
    home the night of the killing. Additionally, appellant’s DNA was identified from bloodstains
    found in the victim’s bedroom and on the victim’s sweatshirt after appellant had been barred
    from the residence pursuant to a protective order for over a year. Further, the medical examiner
    opined that the victim was strangled and suffocated and that her death was inconsistent with
    suicide.
    In light of the testimony’s lack of importance and the overall strength of the
    Commonwealth’s case, we conclude that any error potentially resulting from the admission of
    the testimony regarding appellant’s reaction after being notified of the victim’s death was
    harmless beyond a reasonable doubt.26
    H. Cross-Examination of Z.C. and Limitation of Questioning of McCaffrey
    Z.C. testified at trial. On direct examination, he testified that he left his blanket in the
    victim’s bed the night she was killed. He testified that appellant brought him his blanket that
    night while he was in his brother J.C.’s room. He testified that he knew it was appellant because
    he could see his face.
    On cross-examination, counsel for appellant asked Z.C. if he sometimes threw things at
    people, and he replied no.27 Counsel then asked Z.C. if the Commonwealth’s attorney had
    “talked to you a lot about whether or not you threw something at [appellant] two years ago?,”
    and Z.C. replied yes. Z.C. stated that he did not know how many times he had talked about the
    matter with the Commonwealth’s attorney, but that it was more than once. Counsel then asked
    26
    While we acknowledge that the evidence of appellant’s reaction was not cumulative or
    corroborated by other evidence, we find that these factors are not dispositive to the question of
    whether its admission constituted constitutional error in the present case because of the
    overwhelming evidence of appellant’s guilt and the lack of probative value of the testimony
    itself.
    27
    This line of questioning was related to appellant’s assertion that Z.C. threw a flashlight
    at him the afternoon prior to the victim’s death and that was why he had a black eye the morning
    after her death.
    - 52 -
    whether the Commonwealth’s attorney had “practiced talking to you about whether or not you
    threw a flashlight or threw something towards your dad,” and Z.C. said no. Counsel asked Z.C.
    when he had last “practiced going over this” with the Commonwealth’s attorney, and Z.C. stated
    it had been “a couple [of] weeks ago.” He stated that he did not know if he had previously talked
    to the Commonwealth’s attorney about his testimony. Counsel asked Z.C. if the
    Commonwealth’s attorney had talked about Z.C.’s blanket when they “practiced being here,”
    and at that point the Commonwealth objected, arguing that the question would confuse Z.C and
    mislead the jury because it suggested that Z.C. had rehearsed his testimony with her. The court
    sustained the objection as to the use of the word “practice,” but allowed counsel to ask the
    question. Counsel asked Z.C. further questions about his previous conversations with the
    Commonwealth’s attorney.
    Prior to trial, the Commonwealth filed a motion to exclude testimony regarding Detective
    McCaffrey’s employment history with the Loudoun County Sheriff’s Office. The
    Commonwealth moved the court to order appellant to refrain from referencing at trial the fact
    that McCaffrey was not re-sworn by the sheriff following the sheriff’s re-election and that his
    last day of employment with the office was December 31, 2015, prior to the trial’s
    commencement. During a hearing on the motion, the Commonwealth’s attorney stated that she
    had reviewed the files and spoken with the sheriff and was told that there were no past
    performance issues with McCaffrey. The Commonwealth’s attorney also noted that she had
    requested McCaffrey’s personnel evaluations and any internal investigation files and that all of
    these records reflected that McCaffrey had received high performance assessments. She
    represented that the sheriff had no issues with respect to McCaffrey’s truthfulness, veracity, or
    integrity. The Commonwealth’s attorney informed the court that McCaffrey was not re-sworn
    - 53 -
    by the sheriff due to McCaffrey’s support for another candidate during the primary campaign for
    sheriff.
    The court granted the Commonwealth’s motion, finding that the fact that McCaffrey was
    not re-sworn was not relevant or probative to an issue at trial.
    Discussion
    Appellant argues that the trial court erred by denying him effective cross-examination
    when it did not allow him to question Z.C. about practicing his testimony and did not allow
    questioning about Detective McCaffrey’s employment history.28
    “[L]imitation of cross-examination is within the trial court’s discretion.” Jackson v.
    Commonwealth, 
    266 Va. 423
    , 438 (2003). When a trial court limits a defendant’s
    cross-examination, the accused must proffer the excluded testimony for the record on appeal.
    Stewart v. Commonwealth, 
    10 Va. App. 563
    , 568 (1990). “The purpose for the proffer ‘is to
    assure that the record will be complete.’” Evans v. Commonwealth, 
    39 Va. App. 229
    , 236
    (2002) (quoting Lowery v. Commonwealth, 
    9 Va. App. 304
    , 308 (1990)).
    Appellant argues that the trial court improperly limited his cross-examination when he
    was prevented from questioning Z.C. about practicing or rehearsing his testimony with the
    Commonwealth. However, contrary to appellant’s argument, the record makes clear that he was
    able to properly cross-examine Z.C. about his prior interactions with the Commonwealth’s
    attorney. Here, the trial court did not limit cross-examination on whether Z.C. had prepared for
    28
    Appellant also argues that the trial court erred in limiting cross-examination of J.C. As
    with Z.C., appellant contends that he was not allowed to examine the issue of J.C. practicing his
    testimony with the Commonwealth’s attorney. J.C. also testified at trial. On cross-examination,
    counsel for appellant asked J.C. if he had discussed the timeline of the afternoon prior to his
    mother’s death with the Commonwealth’s attorney. However, counsel did not ask J.C. any
    questions about “practicing” or preparing his testimony with the Commonwealth’s attorney.
    Because counsel did not pursue this line of questioning with J.C., this issue is not before us on
    appeal.
    - 54 -
    trial with the Commonwealth’s attorney, but rather only prohibited the use of the word “practice”
    during questioning. Appellant was allowed to ask and did ask Z.C. several questions about what
    he discussed with the Commonwealth’s attorney in preparation for trial. We find no error in the
    court’s limited restriction on appellant’s cross-examination. Further, even if counsel was
    prevented from eliciting information by not being able to use the word “practice” during
    cross-examination, counsel did not proffer what this testimony would have been. Therefore, on
    appeal, we cannot examine any alleged error because appellant did not proffer what Z.C.’s
    expected testimony would have been in response to questions involving the word “practice.”
    Appellant also argues that the court erred in denying him the opportunity to question
    McCaffrey regarding his work history and performance records. Appellant sought to
    cross-examine McCaffrey on his employment performance history based on the fact that he had
    not been re-sworn by the sheriff.
    “Evidence is admissible if it is both relevant and material.” Patterson v. Commonwealth,
    
    62 Va. App. 488
    , 493 (2013) (quoting Evans-Smith v. Commonwealth, 
    5 Va. App. 188
    , 196
    (1987)). “‘Evidence is relevant if it has any logical tendency, however slight, to establish a fact
    at issue in the case’ [and] . . . ‘material if it relates to a matter properly at issue’ in the case.”
    Cousins v. Commonwealth, 
    56 Va. App. 257
    , 271 (2010) (first quoting Ragland v.
    Commonwealth, 
    16 Va. App. 913
    , 918 (1993); then quoting 
    Evans-Smith, 5 Va. App. at 196
    ).
    At the time the court granted the Commonwealth’s motion prohibiting any questioning
    regarding McCaffrey’s work history, there was no evidence before it that his employment
    history, or the fact that he was not re-sworn, was relevant to a material issue at trial. Thus, the
    - 55 -
    court did not abuse its discretion by denying appellant the opportunity to cross-examine
    McCaffrey about his employment history.29
    I. Brady Claim
    Appellant raises a Brady claim regarding Detective McCaffrey’s actions in an unrelated
    case. The facts relating to this claim are as follows. In June 2015, Alejandra Rueda, one of the
    two Commonwealth’s attorneys prosecuting appellant, was assigned to prosecute a DUI offense
    against James Napier.30 On June 21, 2015, three days prior to Napier’s DUI arrest, Napier’s
    friend, A.H., had died at his home. Detective McCaffrey was assigned to investigate A.H.’s
    death. He consulted with Rueda regarding this investigation approximately one week after
    A.H.’s death to determine if any charges should be filed against Napier. Rueda instructed
    McCaffrey that there were no charges to file at that time because the cause of A.H.’s death was
    still unknown. She instructed McCaffrey to wait until the results of A.H.’s autopsy were known
    and to then inform her of the results. In October 2015, McCaffrey received the results of the
    autopsy report showing that A.H. had died of GHB poisoning.31 McCaffrey wrote in an
    29
    After trial, appellant learned that there was an issue regarding McCaffrey’s truthfulness
    in relation to an investigatory report. We address appellant’s argument regarding this issue in his
    next assignment of error. However, appellant argues under this assignment of error that the trial
    court erred in not allowing questioning on McCaffrey’s employment history because “[h]ad
    [appellant] been able to show that McCaffery had a history of making false reports that
    contributed to his not being re[-]sworn as a deputy, the jury would have been able to consider
    this in the evaluation of his credibility.” This argument is without merit because, as we explain
    infra, the evidence relating to the investigatory report was not proper impeachment evidence and
    was therefore inadmissible.
    30
    At this time, Rueda was also prosecuting appellant for the offenses currently on appeal.
    Appellant was indicted for these offenses in May 2014, and his trial for these charges took place
    during May and June 2016.
    31
    Gamma Hydroxybutyrate, commonly known as “GHB,” is a central nervous system
    depressant. The drug “has not approved use in the U.S., where it is sometimes abused as an
    illicit drug or used in date rape.” Taber’s Cyclopedic Medical Dictionary 988 (23d ed. 2017).
    - 56 -
    investigatory report dated October 23, 2015 that he had consulted with Rueda and that “she
    advised that there was no applicable criminal charge to be filed” against Napier.
    In late October 2015, Napier’s attorney for his DUI charge informed Rueda that Napier
    would be pleading guilty to the offense. Rueda prepared a guilty plea memorandum that stated
    that the Commonwealth agreed to not prosecute Napier for further offenses regarding the events
    described in the police report related to the DUI offense.
    In January 2016, McCaffrey left the Loudoun County Sheriff’s Office and A.H.’s death
    investigation was reassigned to Detective Wayne Promisel. Promisel met with Rueda on January
    12, 2016 and showed Rueda a copy of the autopsy report. After additional investigation by
    Promisel, Rueda suggested that he obtain a warrant charging Napier with distribution of GHB.32
    After Promisel obtained the arrest warrant on February 11, 2016, he provided Rueda with
    all of the investigatory reports in the Napier case. In a written stipulation filed with the trial
    court in Napier’s distribution case,33 Rueda stated that this was the time at which she first saw
    that McCaffrey had written that he had consulted with her and that she had declined
    prosecution.34 Rueda also represented that she had never met with McCaffrey about the death
    investigation after the initial meeting that occurred one week after A.H.’s death and that
    McCaffrey did not provide her with a copy of the autopsy report nor discuss the cause of A.H.’s
    32
    The distribution of GHB charge was suggested to Rueda by Promisel; Rueda was
    unaware of the relevant code section until Promisel suggested it during their January 12 meeting.
    33
    Napier had filed a motion to dismiss his distribution of GHB charge, arguing that
    because A.H.’s death was mentioned in the police report concerning his DUI offense, any
    prosecution related to her death should be barred pursuant to the terms of the DUI plea
    agreement.
    34
    Rueda’s admission makes it clear that she was aware of her disagreement with
    McCaffrey’s statement in his investigatory report in February 2016, prior to trial in appellant’s
    case.
    - 57 -
    death with her. She stipulated that her testimony regarding the matter would be that McCaffrey’s
    report was “incorrect in its statement that he met with [her] and she declined prosecution.”
    On November 7, 2016, following his trial for the offenses on appeal, appellant filed a
    supplemental motion to set aside the verdict and to dismiss due to government misconduct,35
    alleging that the Commonwealth had violated Brady v. Maryland, 
    373 U.S. 83
    (1963), by
    withholding the evidence that Detective McCaffrey had falsified a police report in A.H.’s death
    investigation.
    Following the filing of this motion, on December 1, 2016, Nicole Wittmann, the other
    Commonwealth’s attorney prosecuting appellant, wrote a letter to appellant’s counsel that was
    filed with the trial court. The letter stated that she had met with McCaffrey and that he had
    advised her that in addition to the initial meeting following A.H.’s death, he had met Rueda “in
    passing in the hallway or as a pop-in in her office” after he had received the autopsy report.
    McCaffrey stated that the meeting had been very brief and that he did not show Rueda the
    autopsy report, and merely informed her that the victim had died of an overdose. Wittmann
    wrote that although Rueda did not recall this meeting, she did “not doubt [McCaffrey’s]
    recollection or veracity.”
    On December 6, 2016, the court held a hearing on appellant’s motion. Wittmann stated
    that the Commonwealth did not take, and had never taken, the position that McCaffrey or Rueda
    had “in any way asserted anything that was a lie or a falsehood to the [c]ourt.” Wittmann stated
    that the letter detailed McCaffrey’s own recollection of the incident, which Rueda never asserted
    was false.
    35
    Appellant had filed an initial motion for judgment notwithstanding the verdict and in
    the alternative for a new trial based on several different grounds on September 29, 2016.
    - 58 -
    The trial court denied appellant’s motion to set aside the verdict and dismiss due to
    government misconduct. The court, assuming without deciding that the first two prongs of
    Brady were met, found that appellant had not demonstrated prejudice.
    Discussion
    Appellant argues that the trial court erred by not granting the motion to set aside the
    verdict based upon the Commonwealth’s Brady violation.
    “A Brady violation occurs when the government fails to disclose evidence materially
    favorable to the accused.” Youngblood v. West Virginia, 
    547 U.S. 867
    , 869 (2006). “Brady
    obligations extend not only to exculpatory evidence, but also to impeachment evidence[.]”
    Coley v. Commonwealth, 
    55 Va. App. 624
    , 630 (2010).
    To establish a Brady violation, a defendant must establish that:
    a) The evidence not disclosed to the accused must be favorable to
    the accused, either because it is exculpatory, or because it may be
    used for impeachment; b) the evidence not disclosed must have
    been withheld by the Commonwealth either willfully or
    inadvertently; and c) the accused must have been prejudiced.
    Hicks v. Dir., Dep’t of Corr., 
    289 Va. 288
    , 299 (2015) (quoting Workman v. Commonwealth,
    
    272 Va. 633
    , 644-45 (2006)). “The first two Brady components require the evidence to be
    favorable to the defendant and to have been suppressed by the prosecution. The third Brady
    component is that the defendant must prove prejudice.” Mercer v. Commonwealth, 
    66 Va. App. 139
    , 146 (2016).
    “In making a Brady challenge, [a] defendant cannot simply allege the presence of
    favorable material and win reversal of his conviction. Rather, [he] must prove the favorable
    character of evidence he claims has been improperly suppressed. Speculative allegations are not
    adequate.” 
    Coley, 55 Va. App. at 630
    (alterations in original) (quoting Currie v.
    Commonwealth, 
    30 Va. App. 58
    , 67 (1999)). “We review the trial court’s findings of historical
    - 59 -
    fact only for ‘clear error,’ but we review de novo the trial court’s application of defined legal
    standards to the particular facts of a case [. . .] .” Doss v. Commonwealth, 
    59 Va. App. 435
    , 455
    (2012) (alteration in original) (quoting Blue v. Commonwealth, 
    49 Va. App. 704
    , 710 (2007)).
    In this case, appellant argues that a Brady violation occurred because the evidence of
    McCaffrey’s false police report was favorable to appellant in that it could be used for
    impeachment, it was withheld by the Commonwealth, and this caused prejudice because
    appellant could not use it to impeach the lead detective who was heavily involved in the case.
    Contrary to appellant’s argument, we find that the facts fail to establish that a Brady
    violation occurred because appellant did not establish that the evidence at issue was favorable to
    him, a finding requisite for this Court to conclude that the Commonwealth violated its
    obligations under Brady.36
    As noted above, for evidence to be considered favorable to the accused, it must be either
    exculpatory or able to be used for impeachment. See 
    Hicks, 289 Va. at 299
    . Appellant argues
    that the evidence that McCaffrey had made a false statement on a police report would have
    damaged McCaffrey’s credibility in his trial and thus could have been used as impeachment
    evidence under Rule 2:607(a)(viii).37 Rule 2:607(a)(viii) allows impeachment to be proved by
    “any other evidence which is probative on the issue of credibility because of a logical tendency
    to convince the trier of fact that the witness’s perception, memory, or narration is defective or
    impaired, or that the sincerity or veracity of the witness is questionable.” Appellant relies on the
    36
    As we determine that appellant failed to satisfy the first prong of Brady, we need not
    discuss Brady’s other two requirements, that the evidence not disclosed was withheld by the
    Commonwealth either willfully or inadvertently and that the accused suffered prejudice.
    37
    While we use the term “false report” in our analysis, we note that the trial court
    “assumed but [did] not decide[]” that “[t]he nature of the evidence . . . was false, misleading, or
    otherwise of impeachment value.” Because it is not necessary for the resolution of this issue, we
    express no opinion on whether the facts actually established that McCaffrey had made a false
    statement in the investigatory report in light of his and Rueda’s recollections of the matter.
    - 60 -
    part of the rule that allows impeachment evidence showing “that the sincerity or veracity of the
    witness is questionable.” In other words, appellant alleges that McCaffrey’s false statement on a
    police report was proper impeachment evidence because it demonstrated that his veracity was
    questionable due to the false statement.
    However, in this case, appellant is attempting to attack McCaffrey’s credibility based
    upon one specific act of conduct. Thus, we find the admission of this evidence is properly
    analyzed under Rule 2:608, the evidentiary rule regarding impeachment which discusses specific
    instances of conduct.38 Rule 2:607(a)(i) does allow for impeachment through “introduction of
    evidence of the witness’s bad general reputation for the traits of truth and veracity,” but only “as
    provided in Rule 2:608(a) and (b).” Rule 2:608(b) explicitly limits the application of Rule
    2:607(a)(i) by providing that “specific instances of the conduct of a witness” may neither be
    “used to attack or support credibility” nor “proved by extrinsic evidence.” In this case, evidence
    that McCaffrey had once made a false statement in a police report in an unrelated matter was
    evidence of a specific act which addressed a collateral issue. The alleged false statement in the
    police report was inadmissible to prove McCaffrey’s general untruthfulness because even if his
    statement that he had consulted with Rueda was untrue, it was only a specific act of
    untruthfulness regarding an extrinsic matter. See Massey v. Commonwealth, 
    67 Va. App. 108
    ,
    38
    Although it is true, as noted by appellant, that Rule 2:607(a)(viii) allows impeachment
    to be proved by evidence “that the sincerity or veracity of the witness is questionable,” we find
    nothing in this language that changes or limits the long-standing principle in Virginia prohibiting
    impeachment of a witness’ character by showing specific acts of untruthfulness. See Lambert v.
    Commonwealth, 
    9 Va. App. 67
    , 71 (1989); Clark v. Commonwealth, 
    202 Va. 787
    (1961);
    Bradley v. Commonwealth, 
    196 Va. 1126
    (1955). Further, we also find it appropriate to seek
    guidance in Rule 2:608 as opposed to Rule 2:607(a)(viii) because Rule 2:608 is the more specific
    rule involving impeachment evidence and specific instances of conduct, where Rule
    2:607(a)(viii) concerns the admission of impeachment evidence generally. See Commonwealth
    v. Brown, 
    259 Va. 697
    , 706 (2000) (“[W]hen one statute speaks to a subject generally and
    another deals with an element of that subject specifically, the statutes will be harmonized, if
    possible, and if they conflict, the more specific statute prevails.”).
    - 61 -
    127 (2016) (concluding that defendant failed to establish that the Commonwealth violated its
    obligations under Brady because the statements alleged to be Brady material were collateral and
    thus could not be used for impeachment).
    Appellant failed to satisfy the first prong of Brady because he did not establish that the
    evidence would have been favorable to him. Therefore, no Brady violation occurred by virtue of
    the Commonwealth’s failure to disclose McCaffrey’s alleged false statement on the report prior
    to trial. Accordingly, we find that the trial court did not err in denying appellant’s motion to set
    aside the verdict and to dismiss due to government misconduct.
    J. In Camera Review of Notes
    On April 18, 2016, about a month prior to trial, one of the Commonwealth’s attorneys
    prosecuting appellant’s case emailed his counsel to inform him that the Commonwealth’s
    attorneys had met with three of the Castillo children, J.C., Z.C., and V.C., for the first time that
    day. The email stated that “[t]here are some statements we feel we need to turn over”: first, that
    “[J.C.] indicated that [Z.C.] came in[]to his bedroom at 11pm. Then clarified it may have been
    between 9-11pm;” and second, that “[J.C.] stated that on the evening of March 19th, [appellant]
    said he had somewhere he needed to go. His Aunt Lucy took them to Harris Teeter and his
    father got into a different vehicle. He did not see him drive away, just get into another vehicle.”
    These statements were inconsistent with statements J.C. had previously made. Counsel for
    appellant asked the Commonwealth’s attorney to forward any notes from this meeting, and she
    replied that neither she nor any law enforcement officer had taken notes and that the meeting had
    not been recorded. The Commonwealth’s attorney stated that she had “turned over that which
    the rules and law requires.”
    After this exchange, but prior to trial, the Commonwealth’s attorney informed counsel for
    appellant that Dr. Judy Hanley, director of the Children’s Advocacy Center, where the interviews
    - 62 -
    had taken place, had taken notes during the meeting. Counsel for appellant subsequently
    contacted Dr. Hanley, who informed counsel that she had taken notes but had given them to the
    Commonwealth and did not keep a copy.
    On April 28, 2016, during a scheduling hearing, counsel for appellant informed the court
    about the meeting and noted that after interviewing the children, the Commonwealth had turned
    over new statements made by J.C. that contradicted earlier statements the child had made.
    Counsel stated that Z.C. had also been making inconsistent statements to other interviewers,
    “[s]o there has got to be discrepancies there as far as [Z.C.] is concerned.” Counsel also stated
    that V.C.’s account had been consistent and that he did not know if the child had said something
    different in the meeting, but that he was “sure that the Commonwealth would have given us that
    discrepancy statement if that’s the case.”
    Counsel for appellant asked the court to compel the Commonwealth to turn over the
    notes, or, in the alternative, to review the notes in camera, arguing that the notes could contain
    Brady material and that it was important for the defense to have the “context” surrounding the
    statements. The Commonwealth’s attorney responded that the meeting was for witness
    preparation, not for investigation, and that the notes were attorney-work product. She stated that
    she had provided appellant’s counsel with the inconsistent statements, which was all the
    information she was required to turn over. The court ordered the Commonwealth to review the
    notes in its possession and “comply with Brady consistent with everything you’ve been put on
    notice to do today,” but did not order that the notes be provided to appellant’s counsel. The court
    also declined to review the notes in camera.
    At trial, after the conclusion of the Commonwealth’s direct examination of J.C., counsel
    for appellant informed the court that he had not been aware of some new statements J.C. had
    made during his testimony. He noted that this was the reason he was seeking the notes from
    - 63 -
    Dr. Hanley and again asked the court to compel the Commonwealth to turn the notes over to
    counsel. The Commonwealth responded that J.C.’s statements were a result of new questions
    and were not inconsistent with his prior statements.
    The court denied appellant’s motion. Counsel for appellant asked the court to make
    Dr. Hanley’s notes a part of the record. The court took appellant’s motion under advisement.
    Following trial, the court granted appellant’s motion to make Dr. Hanley’s notes
    regarding J.C. a part of the record. Appellant filed a further motion to also include in the record
    Dr. Hanley’s notes regarding Z.C. and V.C. The court granted the motion as to Z.C. but denied
    it as to V.C.39
    Discussion
    Appellant argues that the trial court erred by not reviewing Dr. Hanley’s notes in camera
    to determine whether they contained exculpatory evidence.40
    “Where the Commonwealth and the defendant dispute the exculpatory nature of . . .
    evidentiary materials, the trial court may conduct an in camera review of the material to resolve
    the dispute.” 
    Currie, 30 Va. App. at 68
    . “The trial court’s determination of the question whether
    it should undertake the review of the disputed material is a discretionary matter. Whether that
    discretion was properly exercised will depend on the specific factors of each case.” Bowman v.
    Commonwealth, 
    248 Va. 130
    , 135 (1994). Among such factors are “the reasons given by the
    39
    The court’s reasoning for denying the motion related to V.C. was that appellant had
    made motions for the production of Hanley’s notes of the interviews of “the children,” but had
    not specifically requested production of the notes of V.C.’s interview.
    40
    Appellant also argues that the court erred in not ordering Hanley’s notes pertaining to
    V.C. to be made a part of the record. However, the notes from V.C.’s interview are included in
    the sealed document containing the notes from J.C.’s and Z.C.’s interviews. Assuming arguendo
    that the court erred in not ordering the notes pertaining to V.C. to be made a part of the record,
    those notes have in fact been included in the record, and thus there remains no error to be
    addressed by this Court.
    - 64 -
    defense in justifying access to the disputed material, the time of the request, or the amount of
    material involved.” 
    Id. at 135-36.
    Mere possibility or speculation that the evidence sought
    “might contain ‘potentially exculpatory evidence’ imposes neither a duty of disclosure upon the
    Commonwealth, nor a duty of inspection in camera by the court.” Ramdass v. Commonwealth,
    
    246 Va. 413
    , 420 (1993) (citation omitted), vacated and remanded on other grounds, 
    512 U.S. 1217
    , original judgment adhered to on remand, 
    248 Va. 518
    , 521 (1994).
    Appellant contends that the inconsistent statements summarized by the Commonwealth’s
    disclosure provided a legitimate basis for his belief that Dr. Hanley’s notes contained additional
    exculpatory evidence under Brady. We disagree and find that the trial court properly exercised
    its discretion in declining to review Dr. Hanley’s notes in camera.
    Here, appellant presented the trial court with no evidence beyond mere speculation that
    the notes contained any additional inconsistent statements made by either J.C. or Z.C.41 The
    speculative nature of appellant’s argument is especially evident in light of the fact that the
    Commonwealth promptly complied with its Brady obligations by providing counsel with the
    inconsistent statements made by J.C. during the child’s interview. Appellant’s argument that the
    notes might have contained additional inconsistencies simply because the Commonwealth
    disclosed other specific inconsistencies does not rise to a level above mere speculation, therefore
    we find that the court had no duty to review the notes in camera.42 See United States v. Savage,
    41
    Further, having reviewed Dr. Hanley’s notes included in the record on appeal, it is
    evident that these notes do not include any potentially exculpatory information regarding the
    testimony of J.C. and Z.C. The notes themselves are Dr. Hanley’s account of the children’s
    conversations with the Commonwealth’s attorneys. The notes do not reveal any further
    inconsistent statements made by J.C. or Z.C. and include nothing else that could be considered
    potentially exculpatory.
    42
    Appellant also argues that the trial court abused its discretion by not reviewing the
    notes in camera because the notes themselves were less than ten pages in length, and therefore
    the review by the court would not have been burdensome. As stated in Bowman, one of the
    factors to consider in determining whether a court properly exercised its discretion in deciding
    - 65 -
    
    885 F.3d 212
    , 222 (4th Cir. 2018) (concluding that in camera review was not required where the
    defendant’s only assertion was that further inconsistent statements “might exist” in a
    prosecutor’s personal notes from the prosecution’s meetings with a witness who had made prior
    inconsistent statements).
    III. CONCLUSION
    For the foregoing reasons, we affirm appellant’s convictions.
    Affirmed.
    whether to review disputed material is “the amount of material 
    involved.” 248 Va. at 136
    .
    However, this is simply one factor to consider and is not dispositive of the question of whether a
    court has abused its discretion in declining to review disputed material in camera. While the
    notes at issue here are short in length, appellant could not provide any basis beyond mere
    speculation for the court to review the material, and its length alone cannot transform the
    material into evidence requiring review by the court.
    - 66 -