What is sufficient evidence to support a juvenile court's finding that appellant possessed a firearm?

As we have discussed, there was ample evidence to support the juvenile court's conclusion that appellant possessed the firearms. He identified the top bunk bed as his, and three rifles were found at that location. This was sufficient to establish his possession. (See People v. Clark (1996) 45 Cal.App.4th 1147, 1151, 1156, 53 Cal.Rptr.2d 99 [evidence supported conviction of being felon in possession of firearm where defendant admitted that he knew there was a shotgun in the motorhome where he was living]; People v. Llamas (1997) 51 Cal.App.4th 1729, 1743, 60 Cal.Rptr.2d 357 [sufficient evidence that defendant, a felon, possessed firearm, where he was observed opening hood of car in which a gun was found, despite wife's testimony that she had placed the weapon under the hood].) The trial court was not required to credit the testimony of appellant's family members over the testimony of the officers who conducted the search.