Walker v. People , 443 P.3d 1007 ( 2019 )


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    ADVANCE SHEET HEADNOTE
    July 1, 2019
    
    2019 CO 69
    No. 17SC595, Howard-Walker v. People—Cumulative Error.
    In this case, the supreme court concludes that a division of the court of appeals
    erred by supplementing this court’s cumulative error standard with caselaw from federal
    courts. The supreme court reaffirms that the proper standard for analyzing cumulative
    error claims stems from Oaks v. People, 
    371 P.2d 443
    (Colo. 1962).
    Applying that standard, the supreme court then concludes that the cumulative
    prejudicial effect of various trial errors deprived the defendant of a fair trial.
    Accordingly, the supreme court reverses the judgment of conviction and remands for a
    new trial.
    The Supreme Court of the State of Colorado
    2 East 14th Avenue • Denver, Colorado 80203
    
    2019 CO 69
    Supreme Court Case No. 17SC595
    Certiorari to the Colorado Court of Appeals
    Court of Appeals Case No. 14CA562
    Petitioner:
    Kyree Davon Howard-Walker,
    v.
    Respondent:
    The People of the State of Colorado.
    Judgment Reversed
    en banc
    July 1, 2019
    Attorneys for Petitioner:
    Megan A. Ring, Public Defender
    Meredith K. Rose, Deputy Public Defender
    Denver, Colorado
    Attorneys for Respondent:
    Philip J. Weiser, Attorney General
    John T. Lee, Senior Assistant Attorney General
    Denver, Colorado
    JUSTICE HOOD delivered the Opinion of the Court.
    ¶1     Two men, one carrying what seemed to be a gun, broke into an unoccupied
    Colorado Springs home and stole roughly $8,000 in cash and other valuables from a safe
    in a bedroom closet. As it happens, the homeowner had a motion-activated camera in
    his alarm clock. The camera captured the burglary, albeit on grainy footage.
    ¶2     The homeowner, who owned a video-editing business, enhanced that footage and
    then shared it with local television news stations, along with an offer of a reward for the
    “conviction” of the burglars. When the video aired on the news, someone identified the
    man carrying the gun in the video as the defendant, Kyree Howard-Walker.
    ¶3     Howard-Walker was ultimately convicted of first degree burglary and conspiracy
    to commit first degree burglary, after a two-day trial. On appeal, he argued that his
    relatively brief trial was riddled with errors that, at the very least, collectively warranted
    reversal.
    ¶4     A division of the court of appeals sifted through the many errors alleged and
    eventually identified eight, but also concluded that those errors did not warrant reversal
    individually or collectively. See People v. Howard-Walker, 
    2017 COA 81M
    , ¶ 2, __ P.3d __.
    In reaching this conclusion, the division adopted a new approach to cumulative error
    review. 
    Id. at ¶¶
    118–21. Instead of relying only on our precedent in Oaks v. People, 
    371 P.2d 443
    (Colo. 1962), the division sought more guideposts and, in so doing, crafted a
    two-step, multi-factor test based on precedent from federal circuit courts. Howard-Walker,
    ¶¶ 120–21. After applying this new cumulative error analysis, the division determined
    that Howard-Walker received a fair trial despite the eight errors. 
    Id. at ¶
    125.
    2
    ¶5       We conclude that the division below erred by supplementing the Oaks standard.
    And under Oaks, we reverse because the cumulative effect of these errors deprived
    Howard-Walker of a fair trial. Because we conclude there was cumulative error, we do
    not address the question of whether plain error is determined at the time of appeal or the
    time of trial. Accordingly, we reverse the judgment of conviction and remand for a new
    trial.
    I. Facts and Procedural History
    ¶6       In August 2013, D.S. spent a night away from his home in Colorado Springs. When
    he returned the next day, he found his home in disarray. The garage door was open, and
    his bed was flipped over. D.S. checked his (accidentally unlocked) safe and saw that
    burglars had “cleaned [it] out,” taking some $8,000 in cash, numerous credit cards,
    watches, jewelry, and other valuables.
    ¶7       After verifying that the burglars had left, D.S. checked the motion-activated
    camera in his alarm clock. The camera had recorded the burglary. The video showed
    two unfamiliar men, both wearing baseball caps and sunglasses, rummaging through
    D.S.’s closet. One man held a black backpack. The other held what looked like a gun.
    ¶8       D.S. called 911. A responding officer took photos of D.S.’s bedroom and the
    suspected entry point in the back of the house, which featured unfamiliar shoeprints. The
    officer collected a copy of the video and brought it, as well as a box touched by one of the
    burglars, back to the precinct for further investigation.
    ¶9       Despite these efforts by the police, D.S. remained uneasy. Worried that someone
    might be trying to kill him, he used software from his video-editing business to enhance
    3
    the crime video. After converting the original footage to a high definition format and
    editing its length, he sent it to local television news stations. He also offered a reward of
    $1,000 per “conviction.”
    ¶10    Shortly thereafter, the enhanced video hit the news. Howard-Walker’s girlfriend’s
    uncle saw it and went to the police station to report that he knew one of the men in the
    video based on the sunglasses and hat the man wore.            He identified that man as
    Howard-Walker, and he provided a photo of Howard-Walker wearing a hat and
    sunglasses like those visible in the video.
    ¶11    Based on that tip, Detective Mark Garcia contacted Howard-Walker’s probation
    officer and asked him to look at still photos from the video to see whether he thought the
    man in the video was Howard-Walker. The probation officer said he was “95 percent
    sure” that it was Howard-Walker in the photos.
    ¶12    Police then arrested Howard-Walker and took him to a police station where
    Detective Garcia interviewed him. Howard-Walker denied participating in the burglary,
    but after the interview, as Detective Garcia walked Howard-Walker back to the holding
    cell area, Howard-Walker asked Detective Garcia “what [it] would . . . get him if
    [Howard-Walker] gave [Detective Garcia] the name of the other person” in the video.
    Detective Garcia responded that “it would build [Howard-Walker’s] credibility” with the
    District Attorney’s Office and “it would help him.” At that point, Howard-Walker
    became emotional and stopped talking.
    ¶13    Upon booking Howard-Walker at the jail, the officers took custody of the personal
    property he had at the time of his arrest. That property included his shoes and a pair of
    4
    sunglasses. Detective Garcia thought the sunglasses resembled those in the camera
    footage. And he found the tread of Howard-Walker’s shoes matched the shoeprints
    found outside D.S.’s home.
    ¶14    The police also executed a search warrant at Howard-Walker’s apartment. The
    warrant included a list of items the officers were looking for—a gold medallion, a gold
    chain, three rings adorned with diamonds, approximately $8,000 in cash, twelve credit
    cards, and multiple watches. The officers found none of these items at Howard-Walker’s
    apartment. The officers also didn’t find a gun, a black backpack, or a hat and sunglasses
    resembling those in the video.
    ¶15    After the search, Detective Garcia showed Howard-Walker’s girlfriend three still
    photos from the video.        According to Detective Garcia, the girlfriend identified
    Howard-Walker as the man in the photos. When Detective Garcia asked how sure she
    was, he said she became visibly upset and responded that she was “80 percent” sure.
    ¶16    Armed with this information, the People charged Howard-Walker with one count
    of first degree burglary and one count of conspiracy to commit first degree burglary. At
    trial, Howard-Walker’s main defense was that he was not the man in the video, and there
    was a “race to a conviction” that resulted in an incomplete investigation. The trial lasted
    less than nine hours over the course of two days, excluding voir dire and jury
    deliberations. The jury convicted Howard-Walker on both charges.
    ¶17    On appeal, a division of the court of appeals found eight errors: five resulting from
    Detective Garcia’s testimony (including the detective’s opinion about Howard-Walker’s
    truthfulness), 
    id. at ¶¶
    47–48, 58, 60, 70, 74, 80; two instructional errors (including failure
    5
    to offer any instruction on the elements of the predicate crime of theft), 
    id. at ¶
    101; and
    one instance of prosecutorial misconduct (involving the district attorney explicitly
    commenting on the defendant’s failure to testify at trial), 
    id. at ¶
    92. Still, it concluded
    that the one preserved error was harmless, 
    id. at ¶
    63, and the other seven unpreserved
    errors were not plain, 
    id. at ¶¶
    48, 72, 74, 81, 94, 102. So, the division turned to
    Howard-Walker’s cumulative error claim.
    ¶18    The division cited our long-standing decision in Oaks. 
    Id. at ¶
    119. There, we noted
    that “numerous formal irregularities, each of which in itself might be deemed harmless,
    may in the aggregate show the absence of a fair trial.” 
    Oaks, 371 P.2d at 446
    . Perhaps
    unsurprisingly, the division looked beyond that broad standard for more meaningful
    guidance, particularly regarding how to analyze cumulative error when a defendant has
    preserved some underlying errors but has failed to preserve others. See Howard-Walker,
    at ¶¶ 118–21. The division adopted a two-step test from the Tenth Circuit. See 
    id. at ¶
    118
    (citing United States v. Caraway, 534 F.3d, 1290, 1302 (10th Cir. 2008)). First, the division
    stated it would review the preserved errors as a group under the harmless error standard.
    
    Id. If the
    preserved errors were not cumulatively harmless, then reversal would be
    warranted. Second, it would examine the preserved and unpreserved errors to determine
    whether collectively they were “sufficient to overcome the hurdles necessary to establish
    plain error.” 
    Id. (quoting Caraway,
    534 F.3d at 1302). The division then looked to a
    nonexhaustive list of factors suggested by the Eleventh Circuit, “including: the nature
    and number of the errors committed; their interrelationship, if any, and combined effect;
    how the district court dealt with the errors as they arose (including the efficacy of any
    6
    remedial efforts); the strength of the government’s case; and, the length of the trial,” as
    further guidance. 
    Id. at ¶
    121 (citing United States v. Baker, 
    432 F.3d 1189
    , 1223 (11th Cir.
    2005), abrogated in part by Davis v. Washington, 
    547 U.S. 813
    (2006)).
    ¶19      In applying its new test, the division first noted that “even the most serious error—
    the     improper   comment      on   Howard-Walker’s      exercise   of   his   right   against
    self-incrimination—was fleeting.” 
    Id. at ¶
    123. “[A]nd the less serious errors bore little
    relation to each other.” 
    Id. The division
    acknowledged that some of Detective Garcia’s
    testimony “may have tended to undermine Howard-Walker’s misidentification defense,”
    but ultimately concluded that the impermissible testimony was “brief.” 
    Id. at ¶
    124. So,
    the division held that “[e]ven when considered cumulatively, these errors were relatively
    small events scattered over the course of a two-day trial, during which substantial
    evidence was presented . . . from which the jury reasonably could have concluded that
    Howard-Walker was the man with the gun.” 
    Id. at ¶
    125. The division, therefore,
    affirmed Howard-Walker’s judgment of conviction. 
    Id. at ¶
    127.
    ¶20      We granted Howard-Walker’s petition for certiorari.1
    1   We agreed to review the following issues:
    1. Whether the court of appeals erroneously held that five trial errors, two
    instructional errors, and one instance of prosecutorial misconduct did
    not rise to the level of cumulative error because the court of appeals
    applied federal cumulative error law for the first time in Colorado,
    contradicting this Court’s precedent.
    7
    II. Analysis
    ¶21    We begin with the standard of review. Then we address the law governing
    cumulative error claims. After deciding to stick with Oaks, we apply that standard to
    Howard-Walker’s case and conclude that he did not receive a fair trial. Therefore, we
    reverse and remand for a new trial.
    A. Standard of Review
    ¶22    We review questions of law de novo. See Ronquillo v. People, 
    2017 CO 99
    , ¶ 13, 
    404 P.3d 264
    , 267. Determining what the proper standard is for reviewing cumulative error
    claims is a legal question. See 
    id. Therefore, we
    review it de novo.
    B. The Right to a Fair Trial and Cumulative Error
    ¶23    “The [D]ue [P]rocess [C]lauses of the United States and Colorado [C]onstitutions
    guarantee every criminal defendant the right to a fair trial.” Morrison v. People, 
    19 P.3d 668
    , 672 (Colo. 2000); People v. Roy, 
    723 P.2d 1345
    , 1349 (Colo. 1986) (“A defendant,
    although not entitled to a perfect trial, has a constitutional right to receive a fair trial.”
    (citation omitted)); see also U.S. Const. amends. V, XIV; Colo. Const. art. II, § 25.
    Encompassed in the right to a fair trial is the right to an impartial jury. See 
    Oaks, 371 P.2d at 445
    –47. This “right comprehends a fair verdict, free from the influence or poison of
    evidence which should never have been admitted, and the admission of which arouses
    2. Whether the court of appeals erred in holding that the improper expert
    testimony was not plain even though the error was plain at the time of
    direct appeal.
    8
    passions and prejudices which tend to destroy the fairness and impartiality of the jury.”
    
    Id. at 447;
    see also U.S. Const. amend. VI; Colo. Const. art. II, §§ 16, 23.
    ¶24    “[N]umerous formal irregularities, each of which in itself might be deemed
    harmless, may in the aggregate show the absence of a fair trial, in which event a reversal
    would be required.” 
    Oaks, 371 P.2d at 446
    . Though an error, when viewed in isolation,
    may be harmless or not affect the defendant’s substantial rights, reversal will nevertheless
    be required when “the cumulative effect of [multiple] errors and defects substantially
    affected the fairness of the trial proceedings and the integrity of the fact-finding process.”
    People v. Lucero, 
    615 P.2d 660
    , 666 (Colo. 1980).
    ¶25    To be clear, cumulative error analysis should never be confused with structural
    error analysis. Structural error, which can require reversal without assessing prejudice,
    is
    a limited class of errors described by the [U.S. Supreme] Court as including
    errors concerning rights protecting some interest other than the defendant’s
    interest in not being erroneously convicted; errors the effects of which are
    too hard to measure, in the sense of being necessarily unquantifiable and
    indeterminate; and errors that can be said to always result in fundamental
    unfairness.
    James v. People, 
    2018 CO 72
    , ¶ 15, 
    426 P.3d 336
    , 339–40 (citing Weaver v. Massachusetts, 
    137 S. Ct. 1899
    , 1908 (2017); United States v. Gonzalez-Lopez, 
    548 U.S. 140
    , 148, 150, 157 (2006));
    People v. Novotny, 
    2014 CO 18
    , ¶ 21, 
    320 P.3d 1194
    , 1201 (“[Structural error] comprehends
    only those defects affecting the framework within which the trial proceeds—errors that
    infect the entire trial process and necessarily render a trial fundamentally unfair—rather
    than simply errors in the trial process itself.” (emphasis added)). For reversal to occur
    9
    based on cumulative error, a reviewing court must identify multiple errors that
    collectively prejudice the substantial rights of the defendant, even if any single error does
    not. Cf. Crim. P. 52 (defining harmless error and plain error). Stated simply, cumulative
    error involves cumulative prejudice.
    ¶26    For several reasons we conclude that the court of appeals erred in fashioning a
    cumulative error test from federal circuit court precedent. First, the parties agree that
    Oaks is the proper standard. Second, Oaks has been the lens through which we have
    analyzed cumulative error claims for nearly sixty years, and, while somewhat opaque, it
    provides necessary flexibility in addressing cumulative error.         Finally, because we
    ultimately conclude that reversal is warranted under Oaks, we need not address now
    whether a more nuanced test is desirable. For the moment, we simply clarify that the
    Oaks standard governs, regardless of whether any error was preserved or unpreserved2—
    thus, reversal is warranted when numerous errors in the aggregate show the absence of
    a fair trial, even if individually the errors were harmless or did not affect the defendant’s
    substantial rights.
    C. The Eight Errors
    ¶27    Of the many errors alleged by Howard-Walker, the division agreed there were
    eight. See Howard-Walker, ¶¶ 2, 117–18. But, the division concluded that none of the
    2In pushing aside these subtleties here, we do not mean to suggest that we would refuse
    an invitation to take a deeper dive in another case, in which distinctions about
    reversibility for different kinds of error might prove more significant. Here, the errors
    were sufficiently prejudicial that these nuances are less significant.
    10
    errors individually demanded reversal. 
    Id. at ¶
    2. The division also concluded that the
    eight errors in the aggregate did not require reversal. 
    Id. Howard-Walker, the
    division
    held, received a fair trial despite the errors. 
    Id. at ¶
    126.
    ¶28      While the parties agreed that the division erred in adopting a new approach to
    cumulative error analysis, that’s where their agreement ends. Howard-Walker argues
    that this was a close case and “[t]he errors infected nearly the entirety of this short trial,”
    substantially prejudicing his right to a fair trial. Opening Br. at 64. The People counter
    that any errors were too “attenuated” from the main issue at trial to constitute a due
    process violation, and there was “overwhelming” evidence establishing the defendant’s
    guilt.
    ¶29      As noted, we are not addressing whether the court of appeals correctly identified
    the trial court’s individual errors.3 Thus, we presume the division below came to the
    correct conclusion as to those errors, and we limit our review to whether the errors arising
    from Detective Garcia’s testimony, the two instructional errors, and the one instance of
    prosecutorial misconduct together constitute cumulative error.
    ¶30      First, we list these eight errors, as determined by the division below.
    3 We acknowledge that the second question we  granted certiorari on does ask us to review
    the court of appeals’ determination on the reversibility of an identified error. However,
    because we ultimately resolve this case on cumulative error, we do not need to address
    that question.
    11
    1. Improper Expert Testimony Regarding Whether the Gun in
    the Video Was Real
    ¶31    The prosecutor elicited improper expert testimony from Detective Garcia about
    whether the gun in the video was real. Without tendering Detective Garcia as an expert
    witness, the prosecutor asked: “How can you tell that’s a real handgun [in the image]?”
    Detective Garcia responded that he could tell based on the size of the barrel of the gun,
    which was large enough for a “large projectile to exit the weapon.”        The division
    identified this testimony as improper expert testimony offered in the guise of lay
    testimony in violation of CRE 702 and Venalonzo v. People, 
    2017 CO 9
    , 
    388 P.3d 868
    . See
    Howard-Walker, ¶ 55. The court reasoned this was so because it “strongly doubt[ed] that
    a witness lacking specialized knowledge [could] determine whether a gun depicted in a
    video was real or fake based on its barrel size.” 
    Id. 2. Improper
    Speculation Regarding the Intentions of the Burglar
    with the Gun
    ¶32    The prosecutor invited improper speculation by Detective Garcia about what the
    burglar might have done if he had encountered the homeowner or the police. Over
    Howard-Walker’s objection, Detective Garcia stated that the handgun was “openly
    displayed with the hand and the finger on the trigger ready to be utilized” and it was
    held in a “threatening manner.” The detective also stated the man in the video was
    “ready to engage” if confronted by someone in the house. The division found that
    allowing this testimony was error because it constituted speculation—Detective Garcia
    didn’t have any personal knowledge about what the person on the video would have
    done. 
    Id. at ¶¶
    60–61 (citing People v. Jones, 
    907 P.2d 667
    , 669 (Colo. App. 1995)). The
    12
    court also noted that, even if there was sufficient foundation for Detective Garcia’s
    testimony, it offended principles of relevancy and CRE 403. 
    Id. at ¶
    62. “What might
    have happened was not an element of the offense[,]” and “[i]t was immaterial whether
    the perpetrator might have committed an additional crime had he encountered the
    homeowner or the police.” 
    Id. 3. Testimony
    Regarding Probable Cause
    ¶33    In response to the prosecutor’s questions about his investigative process, Detective
    Garcia improperly testified that his supervisor said that there was probable cause to
    support a search warrant and an arrest warrant. This was error, the division reasoned,
    because probable cause to search or arrest was not an issue at trial. See 
    id. at ¶
    70 (citing
    People v. Mullins, 
    104 P.3d 299
    , 301 (Colo. App. 2004)). So whether a judge or a police
    officer believed there was probable cause to arrest the defendant was irrelevant to
    whether the prosecutor established the defendant’s guilt at trial. 
    Id. (citing Mullins,
    104
    P.3d at 301; CRE 401).
    4. Testimony Explaining Why the Girlfriend Was Upset
    ¶34    The prosecutor elicited improper testimony from Detective Garcia about why the
    defendant’s girlfriend grew emotional after stating she was “80 percent” sure it was her
    boyfriend in the stills from the camera footage. He stated that she was emotional because
    “[s]he recognized her boyfriend in the photos.” The division explained that admitting
    this testimony was error because Detective Garcia didn’t have any personal knowledge
    of why she was crying “as required by CRE 602.” See 
    id. at ¶
    74.
    13
    5. Testimony Regarding Howard-Walker’s Truthfulness
    ¶35    The prosecutor improperly asked Detective Garcia whether he felt “in [his]
    training and experience” that Howard-Walker was being forthcoming during the
    interview. Detective Garcia said no. The prosecutor then followed up by asking “[d]id
    you feel like [Howard-Walker] was being truthful with you about his involvement?” To
    which Detective Garcia also said no. The division determined that it was “improper to
    ask one witness to opine on the truthfulness of another” when the testimony is not
    “offered to provide context for the detective’s interrogation tactics and investigative
    decisions.” 
    Id. at ¶¶
    79–80 (citing Liggett v. People, 
    135 P.3d 725
    , 733 (Colo. 2006); Davis v.
    People, 
    2013 CO 57
    , ¶ 17, 
    310 P.3d 58
    , 62–63).
    6. Failure to Instruct the Jury on the Predicate Crime
    ¶36    The trial court failed to instruct the jury on the elements of the predicate crime,
    theft. Both the parties and the division agreed that the “jury instructions were deficient”
    because the jury wasn’t instructed on the elements of theft. 
    Id. at ¶
    101; see also 
    id. at ¶
    106
    (citing People v. Palmer, 
    87 P.3d 137
    , 140 (Colo. App. 2003)).
    7. Failure to Define “Intent” for the Jury
    ¶37    The trial court failed to define the word “intent” for the jury even though “intent”
    was the culpable mental state for both the burglary charge and the conspiracy charge.
    The division concluded that this was error because, as with all elements of a crime, the
    culpable mental state—here, intent—must be “established with the same certainty as any
    other material element of the crime[s].” See 
    id. at ¶
    113 (alteration in original) (quoting
    Palmer v. People, 
    964 P.2d 524
    , 527 (Colo. 1998)). And the jury must be instructed on the
    14
    meaning of the word “intent” because “it carries a ‘technical or particular meaning.’” 
    Id. (quoting Griego
    v. People, 
    19 P.3d 1
    , 7 (Colo. 2001)).
    8. Prosecutorial Misconduct in Closing Arguments
    ¶38    In closing arguments, the prosecutor engaged in misconduct when he commented
    on Howard-Walker’s decision not to testify at trial. In discussing the still unknown
    whereabouts of the stolen items, the prosecutor remarked that “there is only one person
    in this room that could tell you where all of those items are now and he won’t.” The
    division agreed that the “prosecutor stepped over the line” in making this statement and
    that he was impermissibly commenting on Howard-Walker’s decision not to testify. See
    
    id. at ¶¶
    91–92; see also Martinez v. People, 
    425 P.2d 299
    , 302 (Colo. 1967) (defining what
    constitutes an impermissible reference to a defendant’s exercise of his right to remain
    silent at trial). In making this comment, the prosecutor infringed upon Howard-Walker’s
    Fifth Amendment rights. See Howard-Walker, ¶ 91 (citing Griffin v. California, 
    380 U.S. 609
    ,
    615 (1965)).
    D. These Eight Errors Cumulatively Warrant Reversal
    ¶39    We now consider whether the cumulative effect of these errors deprived Howard-
    Walker of a fair trial.
    ¶40    In its cumulative error analysis, the division emphasized how each of these errors
    was “brief” or “fleeting,” see 
    id. at ¶¶
    123–124, but the entire trial itself lasted less than
    nine hours (excluding voir dire and jury deliberations), compounding the impact on its
    fairness. More to the point, the question is not whether the errors were “brief” or
    15
    “fleeting” but whether, viewed in the aggregate, the errors deprived the defendant of a
    fair trial. And, here, we conclude that they did.
    ¶41    In reaching its conclusion, the division reasoned that Detective Garcia’s testimony
    that the gun was real and that Howard-Walker would have “engaged” the homeowner
    or police if he had encountered either during the burglary didn’t implicate the main issue
    at trial—whether Howard-Walker was one of the perpetrators. See 
    id. at ¶
    123. But both
    pieces of improper testimony helped to prove an element of first degree burglary that
    sets it apart from second degree burglary: using or threatening the use of a deadly
    weapon.    Compare § 18-4-202(1), C.R.S. (2018) (defining first degree burglary), with
    § 18-4-203(1), C.R.S. (2018) (defining second degree burglary).       So, this improper
    testimony helped establish Howard-Walker’s guilt of the offenses charged and thus
    undermined the fairness of the trial.
    ¶42    Other improper testimony by Detective Garcia also undercut Howard-Walker’s
    primary argument—that he had been misidentified. Detective Garcia’s comments about
    his supervisor agreeing there was probable cause to believe Howard-Walker was the
    perpetrator could have suggested to the jury that, if a police officer and his supervisor
    believed there was probable cause to arrest Howard-Walker, maybe they should too.
    Detective Garcia’s speculation about why Howard-Walker’s girlfriend cried during her
    interview took on greater significance, because the girlfriend partially recanted her
    identification of the defendant at trial.
    ¶43    While Detective Garcia’s testimony about probable cause and the girlfriend’s
    demeanor was perhaps more garden-variety error, the prosecutor’s decision to ask
    16
    Detective Garcia to opine on Howard-Walker’s veracity was highly prejudicial. See
    
    Liggett, 135 P.3d at 732
    (“[A]sking a witness to opine on the veracity of another witness is
    prejudicial, argumentative, and ultimately invades the province of the fact-finder.”).
    Because “were they lying” type questions distort the trial process, we have found them
    “categorically improper.” 
    Id. at 733;
    see also People v. Wittrein, 
    221 P.3d 1076
    , 1081 (Colo.
    2009) (“In Colorado, neither lay nor expert witnesses may give opinion testimony that
    another witness was telling the truth on a specific occasion.”). Allowing the prosecutor
    to ask, and a police detective to answer, this categorically improper question invited the
    jury to abdicate its responsibility to assess Howard-Walker’s credibility. That invitation
    was inherently prejudicial.
    ¶44    That said, we agree with the division that the most serious error occurred during
    closing arguments when the prosecutor commented on Howard-Walker’s exercise of his
    right to remain silent at trial. See Howard-Walker, ¶ 123. A comment is constitutionally
    impermissible if, “in context, [it] was calculated or intended to direct the attention of the
    jury to the defendant’s neglect or failure to exercise his right to testify in his own behalf.”
    
    Martinez, 425 P.2d at 302
    ; see also People v. Todd, 
    538 P.2d 433
    , 436 (Colo. 1975). And, after
    considering the context and content of the prosecutor’s comment, there is only one
    conclusion to draw—it was “calculated” or “intended” to emphasize Howard-Walker’s
    decision to remain silent. The prosecutor stated, at the tail-end of his initial closing
    arguments, the following:
    Now, as for where the items are now. The stolen items, where are they? As
    you know there was another person there. So clearly they could be
    anywhere. Ladies and gentlemen, there is only one person in this room that
    17
    could tell you where all of those items are now and he won’t. From what you
    have heard over the course of this trial, at this point it is proven beyond a
    reasonable doubt. So please find him guilty of both charges. Thank you.
    (Emphasis added.) By drawing attention to the fact that the stolen goods were still
    missing and suggesting that the only person who knew their location was
    Howard-Walker, who didn’t testify, the prosecutor suggested that Howard-Walker chose
    not to testify because he was guilty. That was blatantly prejudicial because it penalized
    Howard-Walker for exercising his constitutional right to remain silent. See 
    Griffin, 380 U.S. at 615
    ; People v. Mozee, 
    723 P.2d 117
    , 123 (Colo. 1986) (“The privilege of a defendant
    to remain silent ‘unless he chooses to speak in the unfettered exercise of his own will’ is
    sufficiently important that the constitution further guarantees that no adverse inferences
    are to be drawn from the exercise of that privilege at trial.” (quoting Carter v. Kentucky,
    
    450 U.S. 288
    , 305 (1981)); cf. People v. Ortega, 
    597 P.2d 1034
    , 1036 (Colo. 1979)
    (“Prosecutorial comment which has the effect of creating an inference of guilt by reference
    to the defendant's silence during custodial interrogation effectively penalizes the
    defendant for exercising a constitutional privilege.”).
    ¶45      While the instructional errors probably didn’t prejudice Howard-Walker, given
    the nature of his defense, the trial court’s failure to define the predicate offense for the
    burglary, the crime of theft, not to mention its failure to completely define the requisite
    culpable mental state, certainly did nothing to promote confidence in the fairness of this
    trial.     As the division reasoned, these errors didn’t substantially prejudice
    Howard-Walker because there wasn’t any dispute at trial over what the underlying crime
    was—both the People and Howard-Walker only discussed theft as the possible predicate
    18
    crime. See Howard-Walker, ¶¶ 110–11. Similarly, the division concluded that the failure
    to define the word “intent” for the jury didn’t substantially prejudice Howard-Walker
    because there was no dispute over “whether the evidence showed that the person in the
    video acted ‘with intent’”—rather, the dispute was whether Howard-Walker was the
    person in the video. See 
    id. at ¶
    114. While the division’s analysis in these respects is
    sound, we noted in Oaks that “technical errors may have a significance requiring a
    reversal in a close 
    case.” 371 P.2d at 446
    .
    ¶46    And, despite the People’s arguments about overwhelming evidence, this case
    arguably was close in several ways: First, the police never found any of the stolen items,
    let alone in Howard-Walker’s possession. Second, the only piece of physical evidence
    tying Howard-Walker to the scene of the crime was a common shoeprint. Third, although
    Howard-Walker was identified as the man in the video by three witnesses aside from
    Detective Garcia, one of those witnesses partially recanted at trial, another was his
    probation officer who had only met Howard-Walker “probably three or four” times for
    about thirty minutes each time, and the third—the defense suggested—had a financial
    motive for identifying Howard-Walker after seeing the crime video on the news.
    ¶47    Perhaps the most significant piece of evidence for the prosecution is that
    Howard-Walker asked Detective Garcia about what he would get if he told him the name
    of the other man in the video.        See Howard-Walker, ¶ 125.    Not surprisingly, the
    prosecution characterized that question as tantamount to an admission of guilt. While
    that is a reasonable inference, it is not the only available inference. Regardless, the
    19
    probative value of this piece of evidence is not enough to overcome the cumulative effect
    the eight errors had on Howard-Walker’s trial.
    ¶48    We conclude that the cumulative prejudice caused by these eight errors deprived
    Howard-Walker of a fair trial, even though individually they were harmless or failed to
    affect Howard-Walker’s substantial rights.
    E. When to Evaluate Plain Error
    ¶49    Because we conclude that Howard-Walker didn’t receive a fair trial due to the
    cumulative effect of the eight errors, we don’t need to reach, and therefore do not reach,
    the question of whether plain error is determined at the time of appeal or the time of trial.
    III. Conclusion
    ¶50    We conclude that the division below erred by supplementing the Oaks standard.
    And under Oaks, we find reversal is warranted because the cumulative effect of these
    errors deprived Howard-Walker of a fair trial.          Because we conclude there was
    cumulative error, we do not address the question of whether plain error is determined at
    the time of appeal or the time of trial. Accordingly, we reverse the judgment of conviction
    and remand for a new trial.
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