In re Rafael C. ( 2016 )


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  • Filed 4/21/16 (unmodified opn. attached)
    CERTIFIED FOR PARTIAL PUBLICATION
    IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA
    FIRST APPELLATE DISTRICT
    DIVISION FIVE
    In re RAFAEL C., a Person Coming
    Under the Juvenile Court Law.
    THE PEOPLE,
    A143376
    Plaintiff and Respondent,
    v.                                                   (Contra Costa County
    Super. Ct. No. J1400437)
    RAFAEL C.,
    Defendant and Appellant.
    It is ordered that the opinion filed herein on March 25, 2016, be modified as
    follows:
    On page 20, delete the first sentence of line 2, which reads: “It found notice had
    been given as required by law.”
    The petition for rehearing is denied. The petition “restates arguments that were
    raised and considered on appeal.” (Gentis v. Safeguard Business Systems, Inc. (1998) 
    60 Cal. App. 4th 1294
    , 1308.) In addition, the petition seeks to raise arguments not included
    in appellant’s briefs. (Reynolds v. Bement (2005) 
    36 Cal. 4th 1075
    , 1092 [arguments
    cannot be raised for first time in petition for rehearing].) The court notes the petition
    1
    improperly cites unpublished case law. (Cal. Rules of Court, rule 8.1115(a) [“an opinion
    of a California Court of Appeal . . . that is not certified for publication or ordered
    published must not be cited or relied on by . . . a party in any other action”].)
    There is no change in judgment.
    Dated ________________                             _____________________________ P.J.
    2
    Superior Court of the County of Contra Costa, No. J1400437, Rebecca C. Hardie, Judge.
    Amanda K. Roze, under appointment by the Court of Appeal, for Defendant and
    Appellant.
    Kamala D. Harris, Attorney General, Gerald A. Engler, Chief Assistant Attorney
    General, Jeffrey M. Laurence, Acting Senior Assistant Attorney General, Donna M.
    Provenzano and Laurence K. Sullivan, Supervising Deputy Attorneys General for
    Plaintiff and Respondent.
    A143376
    3
    Filed 03/25/16 (unmodified version)
    CERTIFIED FOR PARTIAL PUBLICATION*
    IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA
    FIRST APPELLATE DISTRICT
    DIVISION FIVE
    In re RAFAEL C., a Person Coming
    Under the Juvenile Court Law.
    THE PEOPLE,
    A143376
    Plaintiff and Respondent,
    v.                                                   (Contra Costa County
    Super. Ct. No. J1400437)
    RAFAEL C.,
    Defendant and Appellant.
    Rafael C. (Minor) appeals from an order of the juvenile court sustaining a petition
    filed pursuant to Welfare and Institutions Code section 602.1 The petition arose from an
    incident at Minor’s high school in which a firearm was discovered on campus. School
    administrators suspected Minor’s involvement, and in the course of questioning him, they
    seized and searched his cell phone. Interspersed with the text messages on the phone
    were a number of digital images, including a photograph of Minor holding what appeared
    to be the firearm found on campus. When the prosecution sought to use these images as
    evidence in the proceeding below, Minor unsuccessfully moved to suppress them. The
    *
    Pursuant to California Rules of Court, rules 8.1105(b) and 8.1110, this opinion is
    certified for publication with the exception of parts I, II, IV, V, VI, VII, and VIII.
    1
    All further undesignated statutory references are to the Welfare and Institutions Code.
    1
    juvenile court found Minor had possessed an assault weapon, and it declared him a ward
    of the juvenile court.
    On appeal, Minor challenges the denial of his motion to suppress. In the published
    portion of our opinion, applying the twofold test established in New Jersey v. T.L.O
    (1985) 
    469 U.S. 325
    (T.L.O.), we conclude the search of Minor’s cell phone was
    reasonable. Considering all the circumstances, the juvenile court properly found the
    search was justified at its inception and permissible in scope. The lower court thus did
    not err in denying the motion to suppress.
    In the unpublished portion of our opinion, we examine Minor’s other contentions,
    and we find most of them unmeritorious. We agree with Minor, however, that (1) the
    dispositional order must be modified to reflect his maximum term of confinement and (2)
    the matter must be remanded to the juvenile court so that it may calculate the custody
    credits to which he is entitled. We affirm the judgment in all other respects.
    PROCEDURAL HISTORY
    The original petition, filed April 28, 2014, alleged Minor came within section 602
    because on or about February 21, 2014, he possessed an assault weapon (Pen. Code,
    § 30605, subd. (a); count 1) and a short-barreled rifle (Pen. Code, § 33215; count 2).
    Following hearings on August 29 and September 2, 2014, the juvenile court
    denied a motion to suppress evidence, sustained the petition, and found the offenses to be
    felonies.
    On October 3, 2014, the juvenile court declared indefinite wardship, removed
    Minor from the custody of his parents, committed him to the Orin Allen Youth
    Rehabilitation Facility (OAYRF) for a regular six-month program, plus an additional 90-
    day conditional release/parole period. It also imposed various conditions of probation.
    Minor filed a timely appeal.
    STATEMENT OF FACTS
    We summarize below the facts of the offenses. As required when the juvenile
    court’s findings are challenged under the substantial evidence rule, we must view the
    evidence in the light most favorable to the prosecution, and we presume the existence of
    2
    every fact the court could deduce from the evidence. (In re Gary H. (2016) 
    244 Cal. App. 4th 1463
    .) Additional facts relating to the particular legal issues raised on
    appeal are set forth in the discussion section of this opinion.
    Three witnesses, Antioch High School Assistant Principals Jason Murphy and
    Jarrod Bordi, and Antioch Police Officer Daniel Hopwood, testified at a combined
    suppression/jurisdictional hearing. We first recount the evidence relevant to the
    suppression motion before turning to additional evidence presented in support of
    jurisdiction.
    Evidence Presented in Connection With Minor’s Motion to Suppress
    On the morning of February 21, 2014, a campus supervisor at Antioch High
    School became concerned about suspicious behavior by two students, who lacked
    corridor passes or a reason for their presence outside class. It was believed one of the
    students had a firearm he had discarded in a portable trash can on campus. The students
    were placed in adjoining offices inside the vice principals’ suite and questioned about the
    firearm. The firearm (People’s exhibit 1A) and its magazine cartridge (People’s exhibit
    1B) were seized from a trash can and taken to the principal’s office where Murphy saw
    them. Murphy and other vice principals acted to secure the school and to provide
    direction to the supervisors.
    Murphy participated in questioning the two students, and he communicated with a
    supervisor to ensure no students were in the hallways without a pass and to detect any
    suspicious student behavior. During a five-minute passing period, students passed the
    vice principals’ offices in the main arcade of the school only once, which was the normal
    behavior of students changing classrooms in that timeframe. Murphy and the supervisor
    noticed Minor exhibiting “odd” behavior; he kept walking back and forth past the vice
    principals’ offices. Minor passed by a number of times and looked into the office.
    At one point, Minor entered the office, which students are forbidden to do without
    a pass or permission. Because of the firearm in the principal’s office, the administrators
    immediately “shoo[ed]” Minor and other students out. Other students left without
    questioning the situation, and Minor alone was “slow dragging” and “kind of lingered”
    3
    by the office door. Eventually, Murphy asked Minor into the office to find out why he
    was there and determine the reason for his behavior. The administrators were concerned
    because they did not yet know if other parties were involved in bringing the firearm onto
    campus.
    A supervisor instructed Minor to come into the office, but Minor ignored the
    request and kept walking. Murphy sent the supervisor after Minor, but Minor ignored the
    supervisor’s call to return. Instead, Minor hurriedly walked away without turning
    around. The supervisor finally caught up with Minor and walked back with him to the
    office.
    Minor was brought to a vice principal’s office where he was questioned. Minor
    was asked why he had lingered outside and did not come back as requested. Minor
    became “physically fidgety” and “immediately reached down into his pocket.” At the
    time, Murphy knew the student with the firearm had concealed it in his pants leg before
    he had discarded it into the trash can. When Minor reached into his pocket, Murphy was
    “concerned that maybe this student also had a concealed weapon” for which he was
    reaching, and told his colleagues, “ ‘Don’t let him keep it in his pocket.’ ”
    Minor resisted the administrators and he and they fell to the ground in a struggle.
    Murphy reached into Minor’s pocket and realized he was resisting the administrators in
    order to try to interact in some way with his cell phone, so he removed the phone from
    Minor’s pocket. Minor was then released from restraint and asked what he was doing,
    but he did not respond.
    Murphy testified that the principal’s protocol was that the vice principals are to
    search a student’s cell phone on reasonable suspicion of a communication that could put a
    student or staff at risk of harm. Murphy was concerned Minor had used the phone to
    communicate with the student in custody about the firearm or possibly to communicate
    about another firearm or weapon. Murphy was aware the student with the firearm knew
    Minor and testified that Minor’s academic assistant principal knew Minor was a friend of
    that student. Murphy was also aware that a verbal altercation had occurred that morning
    4
    when the other student was “attempting to communicate with people on his cell phone
    while he was in the office being interviewed about having the firearm.”
    Murphy determined Minor had somehow turned off the cell phone. Not knowing
    how to turn the phone on, Murphy plugged it into a USB cable, which brought the phone
    back online. Minor’s “collection of text messages and things” included photographs that
    “showed up” on the phone when “we brought it back online,” and “we were to able to
    open it up[.]” The photographs were of students holding the confiscated firearm Murphy
    had seen earlier that morning in the principal’s office. Murphy plugged the phone into
    the office computer and was able to take a screenshot of the photographs on the phone.
    The screenshots were printed, and the photographs in the computer system deleted. Over
    foundation and best evidence objections, Murphy identified a packet of photographs
    (People’s exhibit 2) as the photographs he saw “on the student’s phone and also on our
    computer when we plugged it in.” Photographs in the exhibit packet depict Minor
    holding the firearm. Other photographs depict the same firearm. Murphy testified
    Minor’s appearance in the photographs is consistent with how he looked on or about
    February 2014. Based on the evidence, the juvenile court found a reasonable
    administrative school search and denied the motion to suppress.
    Further Evidence Regarding Jurisdiction
    At the time of the incident, Bordi was Minor’s assistant principal for discipline at
    the school, which Minor had attended for the entire year. Bordi was involved in the
    investigation of the two students who brought the gun to school. He testified the
    administrators and supervisors were “really concerned” when Minor “seemed to be
    coming into the office, very interested, wanting to know what was going on. And we
    became more concerned on what connection he had to some of our other students.”
    That morning, Bordi’s colleague recovered the photographs from the cell phone
    showing Minor holding the weapon, and Bordi had the opportunity to speak with Minor
    about his potential involvement in the incident with the gun at school. When questioned,
    Minor became irate and screamed profanities. Minor told Bordi, “ ‘Those are my photos.
    You can’t do that.’ ” Minor got up and postured towards the vice principal. Campus
    5
    supervisors were called; Minor became belligerent on their arrival and had to be subdued.
    The Antioch police were alerted that the student had lost control. Bordi suspended Minor
    that day.
    Bordi testified Minor’s appearance as depicted on the photograph on the first page
    of People’s exhibit 2 was consistent with how he looked on February 21, 2014, including
    his wearing a sweatshirt like the one he had on in the photograph. Bordi reviewed
    Minor’s attendance record, and there was no indication of any out-of-state travel.
    Officer Hopwood testified he responded to the school on the report of a student
    with a firearm, and in the principal’s office he took custody of the confiscated firearm
    and magazine cartridge. Hopwood identified People’s exhibit 1A as a .22-caliber Ruger
    shortened to an 18.5-inch overall length and six-inch barrel. The gun bore the serration
    marks of obvious cuts from the removal of portions of the buttstock and the barrel of a
    rifle that originally was significantly longer. The alterations resulted in a pistol grip more
    convenient for close quarters concealment. Hopwood also testified the 30-round
    magazine attaches and detaches “right in front of the trigger housing” and “outside the
    pistol grip.” The photograph on the first page of People’s exhibit 2 shows the detachable
    magazine was attached in that forward position outside the pistol grip. People’s exhibit
    1B, a 30-round detachable magazine, was attached to the gun when taken into the
    officer’s custody. A function check by Officer Hopwood showed the gun was operable.
    Officer Hopwood identified the weapon depicted in the photographs in People’s exhibit 2
    as the weapon he found at school that day and the “same gun I picked up that day I
    logged into evidence. And I brought it to and from the courtroom.”
    At the close of the evidence, the juvenile court again overruled the foundation
    objection to People’s exhibit 2. The court sustained the petition beyond a reasonable
    doubt. It also found the offenses to be “serious felonious conduct,” and found notice was
    given as required by law.
    DISCUSSION
    Minor raises a number of arguments on appeal. He contests the juvenile court’s
    evidentiary rulings, its subject matter jurisdiction, its ruling on his motion to suppress,
    6
    and its factual findings. He also contends it failed to fulfill certain statutory obligations,
    abused its discretion by declaring his offenses felonies, and imposed unconstitutional
    probation conditions. Finally, Minor argues the dispositional order must be modified to
    correct various defects. We will address these arguments in the order Minor presents
    them.
    I.      The Digital Photographs Taken from Minor’s Cell Phone Were Sufficiently
    Authenticated.
    Minor argues the juvenile court erred by admitting digital photographs found on
    his cell phone because the images were inadequately authenticated and irrelevant. He
    contends that without these photographs there is insufficient evidence to support the
    judgment. We will address these contentions after setting forth the relevant law and our
    standard of review.
    A.    Governing Law and Standard of Review
    Under the Evidence Code, a photograph is classified as a “[w]riting.” (Evid.
    Code, § 250.) Before a writing may be received in evidence, it must be authenticated.
    (Evid. Code, § 1401, subd. (a).) “Authentication of a writing means (a) the introduction
    of evidence sufficient to sustain a finding that it is the writing that the proponent of the
    evidence claims it is or (b) the establishment of such facts as by any other means
    provided by law.” (Evid. Code, § 1400.) “[T]he proponent’s burden of producing
    evidence to show authenticity (§ 1400) is met ‘when sufficient evidence has been
    produced to sustain a finding that the document is what it purports to be. [Citation.]’
    [Citation.] The author’s testimony is not required to authenticate a document (§ 1411);
    instead, its authenticity may be established by the contents of the writing (§ 1421) or by
    other means (§ 1410 [no restriction on ‘the means by which a writing may be
    authenticated’]).” (People v. Valdez (2011) 
    201 Cal. App. 4th 1429
    , 1435 (Valdez).)
    “ ‘[I]t is well settled that the showing may be made by the testimony of anyone who
    knows that the picture correctly depicts what it purports to represent.’ [Citations.]”
    (People v. Chism (2014) 
    58 Cal. 4th 1266
    , 1303.) “ ‘As long as the evidence would
    support a finding of authenticity, the writing is admissible. The fact conflicting
    7
    inferences can be drawn regarding authenticity goes to the document’s weight as
    evidence, not its admissibility. [Citations.]’ [Citation.]” 
    (Valdez, supra
    , 201
    Cal.App.4th at p. 1435.)
    The authenticity of a writing is a preliminary fact. (Evid. Code, § 403,
    subd. (a)(3).) “[T]he trial court must determine whether the evidence is sufficient to
    permit the jury to find the preliminary fact true by a preponderance of the evidence[.]”
    (People v. Marshall (1996) 
    13 Cal. 4th 799
    , 832.) In so doing, “the court need only
    conclude that a prima facie showing has been made that the photograph is an accurate
    representation of what it purports to depict.” (In re K.B. (2015) 
    238 Cal. App. 4th 989
    ,
    997.) “ ‘The decision whether the foundational evidence is sufficiently substantial is a
    matter within the court’s discretion.’ [Citations.]” (People v. Bacon (2010) 
    50 Cal. 4th 1082
    , 1103.) Accordingly, on appeal, the juvenile court’s decision as to whether the
    foundational evidence is sufficient is reviewed for abuse of discretion. (In re 
    K.B., supra
    ,
    238 Cal.App.4th at p. 995.)
    B.     The Juvenile Court Did Not Abuse its Discretion in Concluding the
    Photographs Were Sufficiently Authenticated
    Minor contends the images contained in People’s exhibit 2 were not sufficiently
    authenticated. His argument has a legal and a factual component. As a legal matter,
    Minor argues heightened standards of authentication should be required for the images.
    In Minor’s view, “[p]roper authentication of the images required the prosecution to
    identify the scene and its coordinates in time and place, and to show that the images were
    genuine for the purpose offered.” He further contends that “since the images were from a
    cell phone, more precise technical details and a higher degree of scrutiny was required
    than for . . . film photographs[.]” On the facts, Minor disputes the sufficiency of the
    authentication evidence on which the trial court relied, and he suggests the images might
    not have been taken by the cell phone or might have been faked or manipulated in some
    way. We disagree with Minor on both counts.
    8
    1.     There Are No Heightened Authentication Requirements for Digital
    Images
    First, contrary to Minor’s contentions, California law does not subject digital
    images such as those at issue here to heightened foundational standards. Indeed, in
    People v. Goldsmith (2014) 
    59 Cal. 4th 258
    (Goldsmith), a case upon which Minor relies,
    the California Supreme Court expressly declined “to require a greater showing of
    authentication for the admissibility of digital images merely because in theory they can
    be manipulated.” (Id. at p. 272.) Instead, it concluded “[t]he standard foundational
    showing for authentication of a photograph, video, or other writing will suffice” for
    digital images. (Ibid.) “No elaborate showing of the accuracy of the recorded data is
    required.” (People v. Dawkins (2014) 
    230 Cal. App. 4th 991
    , 1003 [affirming sufficiency
    of authentication of digital audio recording].) Thus, under Goldsmith, the foundation for
    a digital image may be supplied by the person taking the photograph or by a person who
    witnessed the event being recorded. 
    (Goldsmith, supra
    , 59 Cal.4th at p. 268.)
    Alternatively, authentication “may be supplied by other witness testimony, circumstantial
    evidence, content and location. [Citations.] Authentication also may be established ‘by
    any other means provided by law’ (§ 1400), including a statutory presumption.” (Ibid.)
    2.     The Evidence of Authentication Was Sufficient
    People’s exhibit 2 was offered to show Minor had possessed a sawed-off rifle on
    or about the charged date. The images at issue were found intermingled with texts
    collected on Minor’s cell phone. The phone itself was in Minor’s possession when the
    images were discovered. The juvenile court could properly consider this circumstantial
    evidence in determining whether the images had been sufficiently authenticated. (See
    People v. Smith (2009) 
    179 Cal. App. 4th 986
    , 1002 [documents sufficiently authenticated
    where they were found in defendant’s office intermingled with other documents
    authenticated by testifying victims].) Moreover, Murphy identified People’s exhibit 2 as
    the printout he made of the photographs he discovered on the cell phone confiscated from
    Minor, photographss that were later uploaded to the school computer. He testified he had
    9
    taken the cell phone from Minor’s pocket after a struggle in which Minor attempted to
    retain possession of the phone.
    The parties do not dispute Minor is depicted in some of the photographs, and there
    is also no dispute that the item he is depicted holding in the photograph on the first page
    at least appeared to be the firearm confiscated at school. Murphy identified the first page
    of People’s exhibit 2 as depicting Minor holding the confiscated firearm he had identified
    as the one in the principal’s office that morning at school. Officer Hopwood identified
    the firearm depicted in the exhibit as the gun and the attached magazine he placed in
    evidence in the principal’s office that day. Murphy and Bordi testified Minor’s
    appearance as depicted in the photographs was consistent with how he looked on or about
    February 21, 2014, including his wearing a sweatshirt like the one he had on in the
    photographs.
    In addition, there was other corroborating evidence before the trial court. The
    court could reasonably infer Minor had struggled with the administrators to prevent them
    from finding the photographs on his cell phone after the gun was confiscated. Indeed,
    when Bordi spoke with Minor about implementing a suspension for his behavior that day,
    Minor became irate and responded, “ ‘Those are my photos. You can’t do that.’ ” Such a
    statement could be viewed as an admission by Minor that the photographs were authentic.
    (Evid. Code, § 1414, subd. (a) [writing may be authenticated by evidence that “party
    against whom it is offered has . . . admitted its authenticity”]; People v. Lynn (1984) 
    159 Cal. App. 3d 715
    , 735 [defendant’s handwritten notes sufficiently authenticated under
    Evid. Code, § 1414 where defendant told inmate who turned notes over to authorities that
    he “ ‘really fucked up, giving the notes over’ ”].) Given all of this evidence, the trial
    court’s conclusion that People’s exhibit 2 was properly authenticated was not an abuse of
    discretion.2
    2
    Citing People v. Beckley (2010) 
    185 Cal. App. 4th 509
    (Beckley), Minor contends the
    digital images at issue in this case “present greater accuracy and reliability concerns”
    than ordinary photographs. Minor quotes Beckley’s observation that “digital photographs
    can be changed to produce false images” (
    id. at p.
    515), and he speculates the
    10
    II.    California Has Subject Matter Jurisdiction Over the Offenses
    Minor contends the trial court lacked subject matter jurisdiction, because the
    evidence failed to establish the offenses were committed within the State of California.
    According to Minor, the prosecution based the charges on the photographs recovered
    from Minor’s cell phone, and he claims there was no evidence of where those
    photographs were taken. Thus, in his view, the trial court lacked subject matter
    jurisdiction.
    Minor suggests the evidence was lacking because there was no GPS data attached
    to the photographs showing where they were taken. He cites no authority holding such
    evidence is necessary to establish where photographs were taken, and we decline to adopt
    any such requirement. Here, the People offered significant circumstantial evidence upon
    which the juvenile court could rely in concluding the offense was committed in
    California. For example, Minor had attended Antioch High School in Contra Costa
    County for the entire year. On the date of the offense, the firearm Minor was shown
    holding in People’s exhibit 2 was brought to his school and placed in a trash can by a
    student known to him. School officials testified that Minor’s appearance in the
    photographs with the firearm matched his appearance on or about that date, including the
    sweatshirt he wore to school at the time. His attendance record for the relevant time
    period showed no out-of-state absences. Perhaps more important, Minor’s suspicious
    conduct immediately before and after discovery of the photographs permitted the trial
    court to find he was aware of the firearm’s presence at the school. His conduct could be
    read as reflecting awareness that the photographs inculpated him in the crime.
    Moreover, Minor’s opening brief points to absolutely no evidence suggesting he
    had ever been absent from the state. Although Minor’s trial counsel alluded in his
    photographs taken from Minor’s cell phone might have been manipulated. For this
    reason, Minor appears to suggest the People were required to present more extensive
    foundational evidence to authenticate them. But as we have noted, Minor’s argument is
    foreclosed by Goldsmith. 
    (Goldsmith, supra
    , 59 Cal.4th at p. 272 [refusing “to require a
    greater showing of authentication for the admissibility of digital images merely because
    in theory they can be manipulated”].)
    11
    questioning to the possibility that Minor might have gone to Reno or Las Vegas at some
    unspecified time, Minor’s briefs offer nothing other than speculation on this point. Thus,
    the trial court could properly rely on the circumstantial evidence set forth above to
    conclude Minor committed the offense in California. The value of the evidence is not
    diminished by Minor’s unfounded suggestion that the crime might have occurred
    elsewhere.
    III.   Minor’s Motion to Suppress Was Properly Denied
    Minor contends the juvenile court erred in denying his motion to suppress
    evidence because the search of his cell phone lacked sufficient justification, was
    excessively intrusive, and required a warrant. We will examine these contentions after
    explaining the standards governing searches of students by school officials and the scope
    of our review.
    A.     Governing Law and Standard of Review
    “[S]chool officials may conduct a search of the student’s person and personal
    effects based on a reasonable suspicion that the search will disclose evidence that the
    student is violating or has violated the law or a school rule. ‘Reasonable suspicion’ is a
    lower standard than probable cause. Ultimately, the legality of the search ‘depend[s],
    simply, on the reasonableness, under all the circumstances, of the search.’ ” (In re Cody
    S. (2004) 
    121 Cal. App. 4th 86
    , 91, fn. omitted (Cody S.), quoting 
    T.L.O., supra
    , 469 U.S.
    at p. 341.) In T.L.O., “the court held that teachers and school officials need not obtain a
    warrant or have probable cause to search a student. ‘Rather, the legality of a search of a
    student should depend simply on the reasonableness, under all the circumstances, of the
    search.’ [Citation.] The court set forth a twofold inquiry for determining the
    reasonableness of a student search. The action must be ‘justified at its inception’ and the
    search, as actually conducted, must be ‘ “reasonably related in scope to the circumstances
    which justified the interference in the first place.” ’ [Citation.] ‘Under ordinary
    circumstances, a search of a student by a teacher or other school official will be “justified
    at its inception” when there are reasonable grounds for suspecting that the search will
    turn up evidence that the student has violated or is violating either the law or the rules of
    12
    the school. Such a search will be permissible in its scope when the measures adopted are
    reasonably related to the objectives of the search and not excessively intrusive in light of
    the age and sex of the student and the nature of the infraction.’ [Citation.]” (In re
    William V. (2003) 
    111 Cal. App. 4th 1464
    , 1469 (William V.).)
    On appeal from the denial of Minor’s motion to suppress, we review the evidence
    in the light most favorable to the juvenile court’s ruling. (William 
    V., supra
    , 111
    Cal.App.4th at p. 1468.) We must uphold the lower court’s express or implied findings if
    they are supported by substantial evidence, but we independently determine whether
    those facts support the juvenile court’s legal conclusions. (Ibid.) “As far as the legality
    of the search is concerned, it is irrelevant that the court relied on an erroneous legal
    theory if the court’s ruling was correct on any legal theory which is applicable to the
    case.” (Cody 
    S., supra
    , 121 Cal.App.4th at p. 92, fn. 4.) Finally, because the presence of
    weapons on school campuses is now an unfortunate fact of modern American life, “[w]e
    must be cognizant of this alarming reality as we approach our role in assessing
    appropriate responses by school administrators to campus safety issues.” (In re J.D.
    (2014) 
    225 Cal. App. 4th 709
    , 714.)
    B.     The Search Was Justified at its Inception
    Minor contends the search of his cell phone was not justified at its inception
    because there was no reasonable suspicion he was guilty of wrongdoing. We disagree.
    The evidence before the juvenile court showed a firearm and its magazine cartridge were
    seized from a trash can where they had been discarded. Two students who were believed
    to have been in possession of the firearm were brought into an administrator’s office for
    questioning. Minor was present in the hallway outside the office where the student with
    the gun was detained, and he was the only person walking back and forth outside the
    office. Minor entered the office, and he lingered at the door even after being told to
    leave. When a school official asked Minor to come into the office, Minor walked away
    quickly and ignored the official’s order to stop. After he was taken into a vice principal’s
    office, asked what he was doing outside the office and why he had ignored the official’s
    directions, Minor immediately started fingering the cell phone in his pocket. He then
    13
    physically resisted when school administrators tried to keep him from manipulating his
    phone and refused to explain why he had resisted them. Minor was also acquainted with
    the student who had brought the concealed weapon onto campus, and that student had
    triggered an incident himself by trying to communicate with someone on a cell phone
    during his own questioning.3
    Based on these facts, the school officials had “reasonable grounds for suspecting
    that the search [would] turn up evidence that the student ha[d] violated or [was] violating
    either the law or the rules of the school.” (William 
    V., supra
    , 111 Cal.App.4th at
    p. 1469.) This is particularly true when one considers the gravity of the situation that
    initially gave rise to the search—the discovery of a firearm and magazine on school
    grounds. (See In re 
    J.D., supra
    , 225 Cal.App.4th at pp. 716-717 [upholding as
    reasonable locker search and other measures taken by school officials after receiving
    report that student involved in earlier shooting was present on campus].) “The need of
    schools to keep weapons off campuses is substantial. Guns . . . pose a threat of death or
    serious injury to students and staff. The California Constitution, article I, section 28,
    subdivision [(f)(1)], provides that students and staff of public schools have ‘the
    inalienable right to attend campuses which are safe, secure and peaceful.’ ” (In re
    Latasha W. (1998) 
    60 Cal. App. 4th 1524
    , 1527.) Here, the facts outlined above—
    particularly Minor’s evasive behavior and resistance to school officials—suggested he
    was either involved in a crime or was trying to hide evidence of one. (In re H.M. (2008)
    
    167 Cal. App. 4th 136
    , 144 [minor’s unusual, suspicious behavior and flight from scene
    “strongly suggested criminal activity was afoot”].) The juvenile court could properly
    find the search justified at its inception.
    3
    We need not ask whether or to what extent the school officials relied on these particular
    facts. Their search will be found reasonable under the Fourth Amendment “ ‘ “as long as
    the circumstances, viewed objectively, justify [the] action.” [Citation.]’ ” (People v.
    Letner and Tobin (2010) 
    50 Cal. 4th 99
    , 145.)
    14
    C.        No Warrant Was Required
    Minor also contends school officials were required to obtain a warrant before
    searching the data on his cell phone. In a brief, one-paragraph argument to the juvenile
    court, Minor asserted public school officials may not search a cell phone without a
    warrant. He relied on the United States Supreme Court’s decision in Riley v. California
    (2014) 
    134 S. Ct. 2473
    (Riley). At the hearing on the motion to suppress, however,
    Minor’s trial counsel did not mention the warrant requirement, arguing instead that the
    search was not justified at its inception and was unreasonable in scope. Trial counsel also
    argued that T.L.O. “sets out the two-pronged determination of reasonableness[.]” Thus,
    while Minor’s contentions on appeal focus on Riley, his counsel did not bring that case up
    at the hearing on Minor’s motion to suppress. The People therefore contend Minor has
    forfeited this argument. Even if the argument has been properly preserved for appeal, it
    is unavailing.
    Minor’s argument suffers from a number of flaws. First, in contending that a
    warrant was required before school officials could search the contents of his cell phone,
    Minor relies heavily on Riley. There, however, the United States Supreme Court
    explicitly based its holding on the applicability of the warrant requirement. 
    (Riley, supra
    ,
    134 S.Ct. at p. 2493.) In contrast, T.L.O. “recognized an exception to the warrant and
    probable cause requirement for searches conducted by public school officials.” (In re
    Joseph G. (1995) 
    32 Cal. App. 4th 1735
    , 1739, italics added.) As the United States
    Supreme Court explained, “[t]he warrant requirement, in particular, is unsuited to the
    school environment: requiring a teacher to obtain a warrant before searching a child
    suspected of an infraction of school rules (or of the criminal law) would unduly interfere
    with the maintenance of the swift and informal disciplinary procedures needed in the
    schools. Just as we have in other cases dispensed with the warrant requirement when ‘the
    burden of obtaining a warrant is likely to frustrate the governmental purpose behind the
    search,’ [citation], we hold today that school officials need not obtain a warrant before
    searching a student who is under their authority.” (
    T.L.O., supra
    , 469 U.S. at p. 340; see
    also Vernonia School Dist. 47J v. Acton (1995) 
    515 U.S. 646
    , 656 [“Fourth Amendment
    15
    rights . . . are different in public schools than elsewhere; the ‘reasonableness’ inquiry
    cannot disregard the schools’ custodial and tutelary responsibility for children.”].) By
    overlooking this key distinction between T.L.O. and Riley, Minor fails to satisfy his
    burden of demonstrating error. (Cf. People v. Williams (1999) 
    20 Cal. 4th 119
    , 129 [in
    making motion to suppress, defendants must do more than assert that search was without
    a warrant; defendants must also show why no exception to warrant requirement applies].)
    Second, as the People point out, Riley concerned “the reasonableness of a
    warrantless search incident to a lawful arrest.” 
    (Riley, supra
    , 134 S.Ct. at p. 2482.) The
    individuals subjected to the searches in Riley were both adults, and neither arrest occurred
    in the school context. (See 
    id. at pp.
    2480, 2481-2482 [one petitioner searched in
    conjunction with arrest for firearms possession after traffic stop and the other searched
    after arrest for distribution of crack cocaine].) Although Minor admits “the matter of a
    school search was not before the Riley Court,” he offers us no case applying Riley to the
    search of a high school student’s cell phone. Riley did not address the particular factual
    situation before us, and cases are not authority for propositions not considered therein.
    (E.g., People v. Knoller (2007) 
    41 Cal. 4th 139
    , 154-155.)
    Third, quite apart from the absence of authority on the point, Riley itself
    acknowledged certain “fact-specific threats may justify a warrantless search of cell phone
    data.” 
    (Riley, supra
    , 134 S.Ct. at p. 2494.) The Riley court alluded to hypothetical
    situations such as “a suspect texting an accomplice who, it is feared, is preparing to
    detonate a bomb[.]” (Ibid.) Here, school officials were confronted by a situation in
    which a loaded firearm had been discovered on school property. They were concerned
    Minor could be using his cell phone to communicate with students who might possess
    another firearm or weapon the officials did not know about. In these circumstances,
    “ ‘[t]he special need for an immediate response to behavior that threatens . . . the safety of
    schoolchildren and teachers . . . justifies the Court in excepting school searches from the
    warrant and probable-cause requirement, and in applying a standard determined by
    16
    balancing the relevant interests.’ ”4 (In re 
    J.D., supra
    , 225 Cal.App.4th at p. 715, quoting
    
    T.L.O., supra
    , 469 U.S. at p. 353 (conc. opn. of Blackmun, J.).)
    Finally, the search in this case occurred before the United States Supreme Court
    issued its opinion in Riley. The People argue that prior to Riley, T.L.O. furnished the
    standard for judging the reasonableness of any search conducted on a student on school
    grounds. Thus, they contend the school officials in this case conducted the challenged
    search “in objectively reasonable reliance on binding appellate precedent.” (Davis v. U.S.
    (2011) 
    131 S. Ct. 2419
    , 2423-2424 (Davis).) The search “therefore was not subject to the
    exclusionary rule.” (People v. Youn (2014) 
    229 Cal. App. 4th 571
    , 573.) We agree with
    the People. Even if we assume the holding in Riley applies to this situation, we decline to
    hold the school officials were bound by a standard that did not yet exist.5
    D.     The Juvenile Court Applied the Proper Standard
    Quoting a two-paragraph excerpt from the juvenile court’s ruling on the
    suppression motion, Minor contends the court applied the wrong standard in denying his
    motion. But Minor’s selective quotation omits the vast bulk of the trial judge’s
    comments, which total almost three pages in the reporter’s transcript. Thus, Minor bases
    his contention on an artificially truncated version of the court’s explanation for its ruling.
    Looking at the full ruling, we discern no error.
    4
    This also suffices to answer Minor’s contention that the search was excessively
    intrusive. Minor asserts the search into the data on the phone was unjustified and that
    any search should have been limited to determining whether there had been weapons-
    related communications. Here, the photographs were intermingled with Minor’s text
    messages. Given the danger posed by the possible presence of firearms on campus, the
    circumstances certainly justified the use of “swift and informal . . . procedures” to
    ascertain the extent of the threat. (
    T.L.O., supra
    , 469 U.S. at p. 340.)
    5
    Minor contends the People may not rely on Davis because they did not raise this
    argument in the trial court and thus have not preserved it for appeal. Minor
    misapprehends both the parties’ respective burdens on appeal and the role of this court.
    As respondent, the People may urge any ground for affirmance supported by the record.
    (E.g., L.K. v. Golightly (2011) 
    199 Cal. App. 4th 641
    , 644.) And as an appellate court, our
    “review is confined to the correctness or incorrectness of the trial court’s [suppression]
    ruling, not the reasons for its ruling.” (People v. Superior Court (2012) 
    204 Cal. App. 4th 1004
    , 1011.)
    17
    Although the juvenile court did not quote verbatim the language from controlling
    case law, it is clear it had the proper test in mind in making its ruling. The court
    explained it had “to determine whether or not the school administrators acted reasonably
    under all of the circumstances that they were presented with at the time.” (See 
    T.L.O., supra
    , 469 U.S. at p. 341 [“the legality of a search of a student should depend simply on
    the reasonableness, under all the circumstances, of the search”].) The court reviewed the
    circumstances confronting the school officials and commented on Minor’s suspicious
    behavior. It then noted, “you do have to see whether or not [the search] was reasonable
    to deal with the specific and special needs or the issues presented at the time.” (See 
    id. at p.
    342, fn. omitted [“a search will be permissible in its scope when the measures adopted
    are reasonably related to the objectives of the search and not excessively intrusive in light
    of the age and sex of the student and the nature of the infraction”].) It noted the school
    administrators feared there might be other guns on campus, a possibility that “presents a
    very extreme risk to the student population.” The court found “it was justified to look at
    the phone itself to see if [Minor] was indeed communicating, as it appeared he was
    manipulating the object, and the other student involved who did bring the gun was
    attempting to use his cell phone to communicate.” It therefore found the search
    “reasonable under the circumstances, and . . . limited in scope and in intrusion.” (See
    ibid.) This approach was fully consistent with T.L.O. and the California cases applying
    it.
    IV.    The Prosecutor and the Juvenile Court Complied with their Obligations Under the
    Deferred Entry of Judgment Act
    Minor next contends the judgment must be reversed because the prosecutor and
    the juvenile court failed to comply with their mandatory duties under the Deferred Entry
    of Judgment Act (DEJ Act; § 790 et seq.), thereby violating his right to due process.
    Minor argues the prosecution failed to comply with its duty to provide notice of his
    eligibility for DEJ and notice of a DEJ hearing. He further argues the court failed to
    comply with its mandatory duties of personally serving the DEJ citation and holding a
    suitability hearing.
    18
    A.     Factual Background
    On April 28, 2014—the day the petition was filed—the prosecutor filed a Judicial
    Council form JV-750 “Determination of Eligibility Deferred Entry of Judgment—
    Juvenile.” That same day, the prosecutor also filed Judicial Council form JV-751, a
    “Citation and Written Notification for Deferred Entry of Judgment—Juvenile.” The
    latter form advised Minor that if the court granted DEJ, he would be required “[t]o admit
    that he . . . committed the offense or offenses alleged to have been committed.” (See
    § 791, subd. (a)(3) [prosecutor’s notification shall include “[a] clear statement that, in lieu
    of jurisdictional and disposition hearings, the court may grant a deferred entry of
    judgment with respect to any offense charged in the petition, provided that the minor
    admits each allegation contained in the petition and waives time for the pronouncement
    of judgment”]; Cal. Rules of Court, rule 5.800(d)(1)-(2) [court may grant DEJ “[i]f the
    child admits each allegation contained in the petition as charged and waives the right to a
    speedy disposition hearing”].) The form JV-751 does not state when the hearing will be
    held. The following day, the prosecutor filed a notice of hearing on the petition, advising
    Minor and his parents of a hearing on May 14, 2014, for “formal reading of petition,
    advisement of rights, and plea.”
    Minor did not appear at the May 14 hearing, and it was continued because the
    public defender appearing on Minor’s behalf indicated there was “an office conflict and
    personal conflict.” At the continued hearing on August 8, 2014, Minor appeared with
    counsel. Counsel informed the court of Minor’s new address and waived reading of the
    petition and formal advisement of rights. Minor’s counsel also entered a denial of the
    charges “and set the matter both for contest . . . with an intervening pretrial conference.”
    Minor’s counsel addressed the court regarding what he called “some type of mix
    up at his initial arraignment[.]” According to trial counsel, Minor and his father had
    indeed come to court on the day of the arraignment but had waited outside the wrong
    courtroom. Addressing Minor’s failure to appear, the juvenile court noted the notice to
    appear had been mailed at or about the same time the petition was filed. The court stated
    19
    it had just been advised that Minor and his parents had a new address, but it noted none
    of the documents had been returned. It found notice had been given as required by law.
    At the close of the August 8 hearing, the juvenile court set a pretrial hearing for
    August 13. The clerk’s transcript shows pretrial hearings were held on both August 13
    and 14 at which Minor appeared with counsel, but the record before us contains no
    reporter’s transcripts of those hearings. The minute order from the August 14 hearing
    states the court set a contested jurisdiction hearing for August 29. On that date, Minor,
    his parents, and counsel all appeared for the contested hearing.
    B.     Minor Has Not Shown He Failed to Receive Notice of DEJ Eligibility
    Section 790, subdivision (b) requires the prosecutor to make information about a
    minor’s suitability for DEJ “available to the minor and his or her attorney.”
    Implementing the statutory command of section 792, California Rules of Court,
    rule 5.800(c) requires that the juvenile court “issue Citation and Written Notification for
    Deferred Entry of Judgment-Juvenile (form JV-751) to the child’s custodial parent,
    guardian, or foster parent.” The form must be personally served on the “custodial adult”
    at least 24 hours before the time set for the appearance hearing. (Cal. Rules of Court,
    rule 5.800(c).)
    On this record, Minor has failed to demonstrate he did not receive notice of his
    eligibility for DEJ. He complains there is no proof of service in the record demonstrating
    the DEJ forms were served on him and his parents. But at the August 8 hearing, Minor,
    through counsel, represented to the trial court that he had come to court on May 14.
    Obviously, if this representation were true, then it would be clear Minor received notice
    of the hearing. And since it appears the petition and all of the notices were sent to the
    same address, we would presume he also received copies of forms JV-750 and JV-751.
    Moreover, in the absence of evidence to the contrary, we must presume the
    juvenile court properly performed its official duty. (Evid. Code, § 664; see § 792
    [requiring issuance of citation to custodial parent]; Cal. Rules of Court, rule 5.800(c)
    [court must issue Judicial Council form JV-751 to minor’s custodial parent].) It is
    Minor’s “burden to provide this court with a complete record on appeal.” (In re Joshua
    20
    S. (2011) 
    192 Cal. App. 4th 670
    , 681, fn. 7.) As the People note, Minor did not include in
    the record the reporter’s transcripts of the pretrial hearings held on August 13 and 14,
    2014 (between the detention and the jurisdictional hearings) where proof of service may
    have been acknowledged or waived.6 (See In re Kathy P. (1979) 
    25 Cal. 3d 91
    , 102
    [where record did not show whether minor consented to adjudication under particular
    statutory procedure, court “will respect the presumption that official duty has been
    regularly performed”]; In re Debra S. (1982) 
    135 Cal. App. 3d 378
    , 384 [minor failed to
    show error by means of adequate record where she failed to request that reporter’s
    transcript of proceedings be prepared].)
    C.     The Juvenile Court Was Not Required to Hold a Suitability Hearing
    Nor did the trial court err by not holding a hearing to consider Minor’s suitability
    for DEJ. Under section 791, subdivision (a)(3), the prosecutor’s written notice to the
    minor must include a clear statement that the juvenile court “may grant a deferred entry
    of judgment with respect to any offense charged in the petition, provided that the minor
    admits each allegation contained in the petition and waives time for the pronouncement
    of judgment[.]” Subdivision (b) of that section makes clear DEJ will be available only if
    the minor fulfills certain conditions: “If the minor consents and waives his or her right to
    a speedy jurisdictional hearing, the court may refer the case to the probation department
    or the court may summarily grant deferred entry of judgment if the minor admits the
    charges in the petition and waives time for the pronouncement of judgment.” (§ 791,
    subd. (b), italics added.)
    Cases interpreting this statutory scheme have held that a suitability hearing is not
    required if the minor, after receiving notice of eligibility for DEJ, rejects DEJ
    consideration by contesting the charges. (In re D.L. (2012) 
    206 Cal. App. 4th 1240
    , 1244.)
    As Division One of this court recently explained, “a juvenile court is not required to rule
    on a minor’s possible suitability for a DEJ where the minor is properly advised of his or
    her DEJ eligibility and fails to admit the charges or waive the jurisdictional hearing
    6
    We note that Minor’s 35-page reply brief does not respond to the People’s arguments
    regarding the inadequacy of the record.
    21
    because such a failure amounts to a rejection of the DEJ’s expedited procedure.” (In re
    Trenton D. (2015) 
    242 Cal. App. 4th 1319
    , 1325.) We have concluded above that Minor
    received proper notice of his eligibility for DEJ. Despite receiving notice and despite
    being represented by counsel, he neither admitted the charges nor waived the
    jurisdictional hearing. Thus, Minor’s actions “were tantamount to a rejection of DEJ.”
    (In re Kenneth J. (2008) 
    158 Cal. App. 4th 973
    , 980 (Kenneth J.).) The juvenile court may
    not “start the DEJ process in the teeth of the minor’s opposition[.]” (Id. at p. 979.)
    Minor was detained, and from the outset, his counsel sought a contested jurisdictional
    hearing. At no time after requesting the contested hearing did counsel suggest DEJ might
    be appropriate. (Cf. In re A.I. (2009) 
    176 Cal. App. 4th 1426
    , 1429-1432, 1435 [minor
    first rejected DEJ but later requested consideration for DEJ after denial of motion to
    suppress].) Minor simply “evince[d] no interest whatsoever” in DEJ. (Kenneth 
    J., supra
    ,
    158 Cal.App.4th at p. 980.)
    This case closely resembles In re Usef S. (2008) 
    160 Cal. App. 4th 276
    (Usef S.).
    There, the prosecutor “determined [the minor] was eligible for DEJ, and provided written
    notice of his eligibility to both [the minor] and the juvenile court.” (Id. at p. 281.) A DEJ
    suitability hearing was scheduled, but the minor failed to appear, apparently because he
    had not been personally served with notice. The hearing was continued, but at the
    continued hearing “and at all subsequent hearings in the matter, the record reveals no
    mention by anyone—not the juvenile court, appellant, his attorney, nor the prosecutor—
    of the DEJ determination.” (Ibid.) The minor’s attorney later indicated his client was
    denying the allegations of the petition and requested a contested jurisdictional hearing.
    On appeal, the minor contended the juvenile court’s failure to address the DEJ
    issue was error and argued the court had failed to discharge a mandatory statutory duty to
    determine his suitability for DEJ. (Usef 
    S., supra
    , 160 Cal.App.4th at p. 281.) The Court
    of Appeal rejected the argument, following Kenneth 
    J., supra
    , 
    158 Cal. App. 4th 973
    .
    (Usef 
    S., supra
    , 160 Cal.App.4th at pp. 285-286.) Usef S. explained that “where the
    minor declines to admit each allegation in the petition, as [section 791] subdivision (a)
    requires, no duty on behalf of the juvenile court arises under subdivision (b) to refer the
    22
    case to the probation department or to summarily grant DEJ[.]” (Usef 
    S., supra
    , 160
    Cal.App.4th at p. 285.) Here, Minor did not admit the allegations of the petition and
    instead requested a contested jurisdictional hearing. As a consequence, the juvenile court
    was under no duty to refer the matter to the probation department or to summarily grant
    DEJ.7 (Ibid.)
    V.     Substantial Evidence Supports the Finding that Minor Knowingly Possessed an
    Assault Weapon
    Minor next raises a plethora of challenges to the sufficiency of the evidence
    showing he knowingly possessed an assault weapon and a short-barreled rifle. We will
    address these challenges after setting forth our standard of review.
    A.       Standard of Review
    “Our review of [Minor’s] substantial evidence claim is governed by the same
    standard applicable to adult criminal cases. [Citation.] ‘In reviewing the sufficiency of
    the evidence, we must determine “whether, after viewing the evidence in the light most
    favorable to the prosecution, any rational trier of fact could have found the essential
    elements of the crime beyond a reasonable doubt.” [Citation.]’ [Citation.] ‘ “[O]ur role
    on appeal is a limited one.” [Citation.] Under the substantial evidence rule, we must
    presume in support of the judgment the existence of every fact that the trier of fact could
    7
    Minor’s reliance on In re C.W. (2012) 
    208 Cal. App. 4th 654
    (C.W.) and In re Luis B.
    (2006) 
    142 Cal. App. 4th 1117
    (Luis B.) is misplaced. In C.W., the prosecutor determined
    the minor was eligible for DEJ and filed form JV-750 but failed to complete or serve
    form JV-751, or give the statutorily required notice of the minor’s eligibility. The minor
    denied the allegations and requested a contested hearing. On appeal, he complained
    about the prosecutor’s failure to give the requisite notice of his eligibility for DEJ, and
    the court’s failure to determine his suitability. Division Four of this court agreed and
    remanded the matter for further appropriate proceedings given the prosecutor’s failure to
    comply with notice in a case where the minor was eligible for DEJ. 
    (C.W., supra
    , 208
    Cal.App.4th at pp. 660-662.) In Luis B., the prosecutor completely failed to determine in
    the first instance whether the minor was eligible for DEJ, never completed form JV-750,
    and never provided any type of notice to the minor. The appellate court also remanded
    the matter given the prosecutor’s failure to determine the minor’s eligibility and comply
    with the notice requirements. (Luis 
    B., supra
    , 142 Cal.App.4th at pp. 1121-1123.) Those
    cases are clearly inapposite, because unlike the case before us, the minors were never
    given the statutorily required notice of their DEJ eligibility.
    23
    reasonably have deduced from the evidence. [Citation.] Thus, if the circumstances
    reasonably justify the trier of fact’s findings, the opinion of the reviewing court that the
    circumstances might also reasonably be reconciled with a contrary finding does not
    warrant reversal of the judgment. [Citation.]’ [Citation.]” (In re V.V. (2011) 
    51 Cal. 4th 1020
    , 1026.)
    “The substantial evidence standard of review is generally considered the most
    difficult standard of review to meet, as it should be, because it is not the function of the
    reviewing court to determine the facts.” (In re Michael G. (2012) 
    203 Cal. App. 4th 580
    ,
    589.) Appellants should therefore “cast their arguments in this court within the confines
    of that basic principle.” (Id. at p. 584.) “Thus, to prevail on a sufficiency of the evidence
    argument, the defendant must present his case to us consistently with the substantial
    evidence standard of review. That is, the defendant must set forth in his opening brief all
    of the material evidence on the disputed elements of the crime in the light most favorable
    to the People, and then must persuade us that evidence cannot reasonably support” the
    factfinder’s decision. (People v. Sanghera (2006) 
    139 Cal. App. 4th 1567
    , 1574.) The
    failure to acknowledge the proper standard of review may be treated as a concession of
    lack of merit. (James B. v. Superior Court (1995) 
    35 Cal. App. 4th 1014
    , 1021.)
    B.      Actual Firearm
    Minor argues there was insufficient evidence he handled an actual firearm. He
    again contends that since the photographs were digital images, they were easily
    manipulable and might be composites. This contention essentially rehashes his argument
    that the photographs were insufficiently authenticated, an argument we have rejected.
    “ ‘The fact conflicting inferences can be drawn regarding authenticity goes to the
    document’s weight as evidence, not its admissibility.’ [Citation.]” 
    (Goldsmith, supra
    , 59
    Cal.4th at p. 267.) When it comes to photographs, “[w]e are not entitled . . . to weigh the
    evidence or its effect and value, nor are we entitled to substitute our deductions for those
    of the trial court where two or more inferences can be reasonably drawn from such
    evidence, because our power is limited to a determination of whether such evidence is of
    sufficient substance to support the trial court’s finding.” (South Santa Clara Val. Water
    24
    Conservation Dist. v. Johnson (1964) 
    231 Cal. App. 2d 388
    , 398.) We decline Minor’s
    implicit invitation to reweigh the evidence before the juvenile court.
    Minor also speculates the firearm might have been a replica, and he contends
    “exacting evidence must be required to establish the true nature of an object in a digital
    image that looks like a firearm.” The law is clear, however, that the fact an object is a
    firearm may be established by either direct or circumstantial evidence. (People v.
    Monjaras (2008) 
    164 Cal. App. 4th 1432
    , 1435.)8 Here, Officer Hopwood identified the
    item depicted in People’s Exhibit 2 as the gun and attached magazine he had taken into
    evidence in the principal’s office. Murphy also identified the photograph as depicting
    that gun, explaining that the photograph on the first page of the exhibit was “the firearm
    that was presented to me earlier in questioning.” The juvenile court could certainly
    compare the item these witnesses identified as the seized firearm with the item Minor is
    holding in the photograph and conclude it was the same weapon. We must accept logical
    inferences the juvenile court might have drawn from the circumstantial evidence.
    (People v. 
    Sanghera, supra
    , 139 Cal.App.4th at p. 1573.)
    C.     Assault Weapon
    Minor also contends there was insufficient evidence the object was an assault
    weapon. Penal Code section 30605 (formerly Penal Code section 12280, subdivision (b))
    states in relevant part: “Any person who, within this state, possesses any assault weapon,
    except as provided in this chapter, shall be punished by imprisonment in a county jail for
    a period not exceeding one year, or by imprisonment pursuant to subdivision (h) of
    Section 1170.” Penal Code section 30515, subdivisions (a)(1)-(8) define the term
    “ ‘assault weapon.’ ” Minor contends the firearm at issue here does not meet the
    definition set out in subdivisions (a)(1) through (a)(3) of Penal Code section 30515. He
    8
    In People v. Monjaras, the Court of Appeal rejected the defendant’s contention that
    because the victim of an armed robbery “could not say whether the pistol in defendant’s
    waistband was a gun or a toy,” there was insufficient evidence the weapon was real. (164
    Cal.App.4th at p. 1435.) The court published its opinion “to say in no uncertain terms
    that a moribund claim like that raised by defendant has breathed its last breath.” (Ibid.)
    We reject Minor’s effort to resurrect this moribund claim.
    25
    argues the firearm was not “a semiautomatic centerfire rifle” nor did it have the other
    characteristics set out in those three subdivisions of the statute.
    The People contend the firearm is one described in Penal Code section 30515,
    subdivision (a)(4)(D) in that it is “[a] semiautomatic pistol that has the capacity to accept
    a detachable magazine and . . . [t]he capacity to accept a detachable magazine at some
    location outside the pistol grip.” They note that in the juvenile court, the defense did not
    dispute the prosecutor’s characterization of the weapon as “a semiautomatic pistol with
    the capacity to accept an attached magazine. And that magazine is located at some
    location outside the pistol grip.” Officer Hopwood, whom Minor characterizes as “a
    weapons expert,” testified that modifications to the original rifle left it with a six-inch
    barrel and a pistol grip, and he stated it could be considered a pistol “[i]f the length is
    within pistol standard.” The firearm introduced in evidence as People’s exhibit 1A met
    the “pistol standard” because the barrel is less than 16 inches. (See Pen. Code, § 16530,
    subd. (a) [“the term[] . . . ‘pistol’ . . . appl[ies] to . . . any device designed to be used as a
    weapon, from which is expelled a projectile by the force of any explosion, or other form
    of combustion, and that has a barrel less than 16 inches in length”].) Officer Hopwood
    also testified the 30-round magazine attaches and detaches “[r]ight in front of the trigger
    housing” and “[o]utside the pistol grip[.]” The photographs in People’s exhibit 2 show
    the pistol grip and the attached magazine outside the pistol grip. “Minor does not
    contend that the rifle’s assault weapon characteristics were obscure. The rifle was also
    introduced into evidence, allowing the trial court to examine it and determine that issue
    for itself.” (In re Daniel G. (2004) 
    120 Cal. App. 4th 824
    , 832 (Daniel G.).) There was
    sufficient evidence from which the juvenile court could conclude People’s exhibit 1A
    was an assault weapon within the meaning of the statute.
    D.      Knowledge
    Minor contends there was insufficient evidence he knew the firearm was an assault
    weapon. He contends his “connection with the object was fleeting and attenuated.”
    Alluding to the photograph of him holding the weapon, Minor asserts that “the passive
    manner in which he appears to be holding the object . . . indicates his lack of familiarity
    26
    with firearms and his lack of awareness of its characteristics.” We find this argument
    meritless.
    In the juvenile court, “the People [bore] the burden of proving [Minor] knew or
    reasonably should have known the firearm possessed the characteristics bringing it within
    the [Assault Weapons Control Act].” (In re Jorge M. (2000) 
    23 Cal. 4th 866
    , 887, fn.
    omitted (Jorge M.).) “The question of the defendant’s knowledge or negligence is, of
    course, for the trier of fact to determine, and depends heavily on the individual facts
    establishing possession in each case. Nevertheless, . . . the Legislature presumably did
    not intend the possessor of an assault weapon to be exempt from the AWCA’s strictures
    merely because the possessor did not trouble to acquaint himself or herself with the gun’s
    salient characteristics.” (Id. at pp. 887-888.) Knowledge may be proven
    circumstantially. (Id. at p. 884.) Moreover, “because of the general principle that all
    persons are obligated to learn of and comply with the law, in many circumstances a trier
    of fact properly could find that a person who knowingly possesses a semiautomatic
    firearm reasonably should have investigated and determined the gun’s characteristics.”
    (Id. at p. 885.) Thus, “it ordinarily is reasonable to conclude that, absent ‘exceptional
    cases in which the salient characteristics of the firearm are extraordinarily obscure, or the
    defendant’s possession of the gun was so fleeting or attenuated as not to afford an
    opportunity for examination,’ a person who knowingly possesses a semiautomatic
    firearm reasonably would investigate and determine whether the gun’s characteristics
    make it an assault weapon.” (People v. Taylor (2001) 
    93 Cal. App. 4th 933
    , 940.)
    Judged by the foregoing standards, the People produced sufficient proof of
    Minor’s knowledge in the juvenile court. Initially, we note a fundamental defect in
    Minor’s argument. By inviting this court to draw inferences from the manner in which he
    appears to be holding the weapon in the photograph, Minor asks us to engage in
    factfinding. As we explained above, where more than one inference may be drawn from
    photographic evidence, we may not substitute our deductions for those of the juvenile
    court. (South Santa Clara Val. Water Conservation Dist. v. 
    Johnson, supra
    , 231
    Cal.App.2d at p. 398.)
    27
    Minor also contends there was no evidence that any of the gun’s physical
    characteristics would have been apparent to “a criminally unsophisticated minor who had
    passing contact with it, particularly not the centerfire aspect[.]” We disagree. Minor was
    certainly able to see the gun’s shortened barrel, its attached magazine ahead of the trigger
    guard, and its pistol grip just by looking at the gun when he held it. The outward
    appearance of the firearm and the magazine would reasonably lead a person possessing it
    to investigate and determine whether it had the characteristics of an assault weapon.
    (People v. 
    Taylor, supra
    , 93 Cal.App.4th at pp. 940-941.)
    Minor argues, “[h]e was just one of four individuals who were photographed with
    [the weapon], and his involvement was the briefest of any.”9 He therefore contends there
    is reasonable doubt as to whether he knew or should have known of the gun’s
    characteristics, because he is “one who was in possession for only a short time, or whose
    possession was merely constructive, and only secondary to that of other joint
    possessors[.]” (Jorge 
    M., supra
    , 23 Cal.4th at p. 888.) Here, as in In re Daniel 
    G., supra
    ,
    “[M]inor seizes on this language to contend his ‘fleeting possession’ as one of four
    persons handling the weapon is insufficient evidence to show that he knew or should
    have known the [gun] was an assault weapon.” (Daniel 
    G., supra
    , 120 Cal.App.4th at
    p. 832, fn. omitted.) But Minor cannot claim the weapon’s characteristics, such as its
    “detachable magazine at some location outside of the pistol grip” (Pen. Code, § 30515,
    subd. (a)(4)(D)) were obscure. (Daniel 
    G., supra
    , 120 Cal.App.4th at p. 832.) The
    firearm was also introduced in evidence, allowing the juvenile court to determine for
    itself whether its characteristics as an assault weapon would have led a reasonable person
    to investigate. “On this record, we hold that there was sufficient evidence to support a
    finding that . . . [M]inor at least should have known the [firearm] was a prohibited assault
    [weapon].” (Ibid.)
    9
    Minor does not explain why the juvenile court should have concluded his involvement
    was briefer than that of the others who were photographed holding the weapon.
    28
    E.       Possession
    Finally, Minor contends there was insufficient evidence he possessed the weapon.
    This contention is easily refuted, because the juvenile court had before it a photograph of
    Minor holding the weapon found at the school. Minor’s suggestion that he did not
    possess the weapon because he was one of a number of individuals who briefly handled it
    finds no support in the law. Possession may be shared with others. (People v. Sifuentes
    (2011) 
    195 Cal. App. 4th 1410
    , 1417.) Indeed, possession need not even be physical, it
    may also be constructive. (People v. Miranda (2011) 
    192 Cal. App. 4th 398
    , 410.) Here,
    the People produced evidence of Minor physically holding the weapon. This is sufficient
    to establish his possession of it. (Daniel 
    G., supra
    , 120 Cal.App.4th at p. 831 [testimony
    that the minor was seen holding a firearm and passing it to others sufficient to establish
    possession].)
    VI.    The Juvenile Court Did Not Abuse its Discretion by Declaring the Offenses
    Felonies
    Minor’s next contention is that the juvenile court abused its discretion in declaring
    the offenses felonies. He argues the court failed to consider all the relevant factors in
    making its decision, thus rendering it arbitrary. We find no abuse of discretion.
    Where a minor “is found to have committed an offense which would in the case of
    an adult be punishable alternatively as a felony or a misdemeanor, the court shall declare
    the offense to be a misdemeanor or felony.” (§ 702.) This is a matter entrusted to the
    juvenile court’s discretion. (See People v. Superior Court (Alvarez) (1997) 
    14 Cal. 4th 968
    , 977.) The factors the court should consider in exercising its discretion include “ ‘the
    nature and circumstances of the offense, the defendant’s appreciation of and attitude
    toward the offense, or his traits of character as evidenced by his behavior and demeanor
    at the trial.’ [Citation.]” (Ibid.) “We will not disturb the court’s decision on appeal
    unless the party attacking the decision clearly shows the decision was irrational or
    arbitrary.” (People v. Sy (2014) 
    223 Cal. App. 4th 44
    , 66.) “ ‘In the absence of such a
    showing, the trial court is presumed to have acted to achieve legitimate sentencing
    objectives, and its discretionary determination to impose a particular sentence will not be
    29
    set aside on review.’ [Citation.] Concomitantly, ‘[a] decision will not be reversed
    merely because reasonable people might disagree. “An appellate tribunal is neither
    authorized nor warranted in substituting its judgment for the judgment of the trial judge.”
    [Citations.]’ [Citation.]” 
    (Alvarez, supra
    , 14 Cal.4th at pp. 977-978.)
    Minor has not demonstrated the juvenile court failed to consider the relevant
    factors. In its ruling, the court discussed more than once the nature and circumstances of
    the offense, explaining that it considered the offense extremely serious because of the
    type of firearm involved and Minor’s failure to disclose its presence on a school campus.
    (See 
    Alvarez, supra
    , 14 Cal.4th at p. 978 [court should consider nature and circumstances
    of the offense].) In addition, the juvenile court referred specifically to the fact that Minor
    may have been high or drunk when he possessed the gun. (See 
    ibid. [court should consider
    defendant’s appreciation of and attitude toward the offense].) On this record,
    Minor has not shown the juvenile court failed to consider the relevant factors in deciding
    to classify the offenses as felonies, and we must therefore presume the court acted to
    achieve legitimate sentencing objectives. (Id. at p. 977.)
    VII.   The Dispositional Order Must Be Modified
    Minor points out a number of alleged defects in the dispositional order. First, he
    contends the juvenile court erred by failing to specify his maximum term of confinement
    (MTC). (See § 726, subd. (d)(1).) He contends his MTC was three years. The People
    concede the juvenile court failed to specify the MTC, and they agree the MTC should be
    three years, although they arrive at that conclusion for reasons different from Minor’s. In
    his reply brief, Minor does not object to the People’s reasoning. We will therefore order
    the dispositional order modified to reflect an MTC of three years. (See In re David H.
    (2003) 
    106 Cal. App. 4th 1131
    , 1138.)
    Minor also contends, and the People agree, that the juvenile court was obligated to
    calculate his custody credits. The juvenile court stated Minor had been confined for “60
    plus days” but it did not calculate the total number of custody credits. The date of
    Minor’s transfer to OAYRF does not appear in the record, and therefore we cannot
    ourselves determine the total number of days to which he is entitled. (Cf. In re J.M.
    30
    (2009) 
    170 Cal. App. 4th 1253
    , 1256 [appellate court calculated total confinement
    credits].) We will accordingly remand the matter to the juvenile court and direct it to
    calculate the total number of days of custody credits.
    Minor contests the $200 restitution fine imposed by the juvenile court. He argues
    the fine “appears to be based on both offenses.” The People contend this argument is
    forfeited, because no objection was raised in the juvenile court. (See, e.g., People v.
    Nelson (2011) 
    51 Cal. 4th 198
    , 227 [failure to object forfeited claim regarding defendant’s
    inability to pay restitution fine].) Even if the claim has been properly preserved,
    however, it fails. There is nothing in the record showing the juvenile court arrived at the
    $200 figure in the way Minor assumes it did. “[T]he absence of information, i.e., a silent
    record, . . . compels the application of the presumption of correctness.” (People v.
    Leonard (2014) 
    228 Cal. App. 4th 465
    , 477, fn. 6.) Here, “[a]t best, the record shows a
    basis for differing opinions of how the court calculated the $[200]. That is not sufficient
    to establish a reversible abuse of discretion.” (Kenneth 
    J., supra
    , 158 Cal.App.4th at
    p. 981.)
    VIII. The No-Contact Probation Condition Is Not Unconstitutionally Vague or
    Overbroad
    Minor challenges as unconstitutionally vague and overbroad a probation condition
    requiring that he have “[n]o association or contact with” three named individuals. Minor
    argues this condition is invalid because it lacks a distance limitation and a knowledge
    requirement. In its oral explanation of the condition, the juvenile court stated, “That
    means no hanging out with, texting, Facebooking, Instagramming, calling any of these
    individuals. [¶] I don’t know if any of these individuals you are going to encounter at
    [OAYRF]. To the extent you do, you are not to congregate with them when you are not
    participating in program activities. [¶] So, in other words, during free time, you are not to
    hang out with them in the rec room, that sort of thing.”
    The People contend Minor’s distance limitation challenge is forfeited because his
    counsel raised no objection below. They argue ordinary principles of forfeiture apply
    because review of Minor’s challenge would require “scrutiny of individual facts and
    31
    circumstances[.]” (In re Sheena K. (2007) 
    40 Cal. 4th 875
    , 885 (Sheena K.).) In their
    view, Minor’s distance limitation challenge does not “ ‘present “pure questions of law
    that can be resolved without reference to the particular sentencing record developed in
    the trial court.” [Citation.]’ ” (Id. at p. 889.) We agree. Indeed, in arguing for the
    distance limitation, Minor contends, “The subjects of the no-contact order here may not
    be readily identifiable to appellant due to the brief nature of their contact, if any, and the
    possibility of changes in appearance.” Minor then cites to certain evidence before the
    juvenile court and asks us to draw conclusions about what it does or does not show.
    Thus, the scope of this condition and its constitutionality can be determined only by
    reference to the sentencing record before the juvenile court. (See In re Luis F. (2009)
    
    177 Cal. App. 4th 176
    , 182 [alleged defects in probation condition requiring minor to
    continue taking prescribed medications could be determined only by facts in record
    regarding medications minor had been taking prior to court order].) Therefore, this claim
    has been forfeited.
    Minor also contends the condition is vague because it does not include a
    knowledge requirement.10 We disagree. First, the probation condition here at issue
    identifies by name the three individuals with whom Minor is to have no contact. It is thus
    unlike conditions that have been found unconstitutionally vague because they refer only
    to categories of persons. (See In re Justin S. (2001) 
    93 Cal. App. 4th 811
    , 816 [probation
    condition prohibiting association with gang members unconstitutionally overbroad unless
    restricted to known gang members].) Here, an ordinary person would certainly
    understand what behavior is prohibited. (In re Byron B. (2004) 
    119 Cal. App. 4th 1013
    ,
    1015,1018 [probation condition prohibiting contact with any person known to be
    disapproved by a parent or probation officer “is not unreasonable, overbroad, or void for
    vagueness”]; see Sheena 
    K., supra
    , 40 Cal.4th at p. 892 [no-contact condition was
    10
    The California Supreme Court granted review in In re A.S. (2014) 
    227 Cal. App. 4th 400
    [
    178 Cal. Rptr. 3d 319
    ] review granted September 24, 2014, S220280. The court granted
    review to determine whether no-contact probation conditions must be modified to include
    an explicit knowledge requirement.
    32
    modified on appeal to include qualification that defendant have knowledge of who was
    disapproved by her probation officer; modification made condition constitutionally
    valid].) Second, the language of the condition must only be reasonably specific. (Id. at
    p. 890.) The juvenile court provided very concrete examples of the types of conduct it
    intended to prohibit. In light of its clarification, Minor can reasonably be expected to
    understand what types of contact or association are forbidden. Finally, although Minor
    raises the issue of possible unwitting violations, his concern is speculative. That is
    particularly true here, where the probation condition notifies Minor “through . . .
    reference to persons whom defendant [knows] to be disapproved of by” the juvenile
    court. (Sheena 
    K., supra
    , 40 Cal.4th at p. 891.)
    DISPOSITION
    The dispositional order is modified to reflect a maximum term of confinement of
    three years. The matter is remanded to permit the juvenile court to calculate Minor’s
    custody credits. In all other respects, the judgment is affirmed.
    33
    _________________________
    Jones, P.J.
    We concur:
    _________________________
    Simons, J.
    _________________________
    Needham, J.
    A143376
    34
    Superior Court of the County of Contra Costa, No. J1400437, Rebecca C. Hardie, Judge.
    Amanda K. Roze, under appointment by the Court of Appeal, for Defendant and
    Appellant.
    Kamala D. Harris, Attorney General, Gerald A. Engler, Chief Assistant Attorney
    General, Jeffrey M. Laurence, Acting Senior Assistant Attorney General, Donna M.
    Provenzano and Laurence K. Sullivan, Supervising Deputy Attorneys General for
    Plaintiff and Respondent.
    A143376
    35