18, 2013 for
which the court found true the allegation that J.B. had committed the offense of
possession of a firearm by a minor (§ 29610). Each offense, which was declared a
felony, carries a three-year maximum term of imprisonment.2


B. The September 30, 2014 Delinquency Petition
       On September 26, 2014, Los Angeles Police Officer Ernie Acuna and his partner
Officer Shaw saw J.B. in the backseat of a parked car. As the officers approached, J.B.
stepped out of the car and slammed the door shut; he appeared to be nervous. J.B. told
the officers he was attempting to leave the area and the car belonged to his cousin. After
J.B. acknowledged he was on probation, Officer Acuna walked up to the car and noticed




1             3
(Ibid.) “Physical confinement includes placement in juvenile hall.” (In re J.M. (2009)
170 Cal.App.4th 1253, 1256.)
       Here, in setting the maximum term of confinement as four years and two months,
it appears the juvenile court elected to aggregate J.B.’s physical confinement based on his
multiple petitions: The three-year upper term for possession of a firearm by a minor
(Dec. 18, 2013 petition), plus one-third of the middle term for the remaining felony and
each misdemeanor (June 14, 2013 and Sept. 30, 2014 petitions) for an additional 14
months, resulting in a maximum term of physical confinement of four years and two
months as found by the court.3
       The juvenile court, however, neglected to also aggregate