Records relating to an unlawful act that, if committed by an adult, would have been a misdemeanor or an act of a child in need of supervision pursuant to NRS 62B.320 may be expunged after the child turns 18. Nev. Rev. Stat. Ann. § 62H.180(1).
If the juvenile court enters an order expunging the records of a child pursuant to this section, all proceedings recounted in the records are deemed never to have occurred. The child may reply accordingly to any inquiry concerning the proceedings and the acts which brought about the proceedings. All records that are in the custody of the juvenile court or any other court will be expunged, and records in the custody of a probation officer, probation department or law enforcement agency will be destroyed. Nev. Rev. Stat. Ann. § 62H.180(1).