A criminal case does not end when the sentence does; the record outlasts it. Nevada does allow records to be sealed, and NRS 179.2445 creates a presumption in favour of sealing — where the prosecutor stipulates, the court shall seal.
NRS 179.245 sets the waiting period, measured from release from actual custody or discharge from parole or probation, whichever is later: 1 year for most misdemeanors; 2 years for a gross misdemeanor, a category E felony, or a misdemeanor battery, harassment, stalking, or protective-order violation; 5 years for a category B, C, or D felony; 7 years for a misdemeanor DUI or battery domestic violence; and 10 years for a category A felony, a crime of violence, or residential burglary under NRS 205.060.
A case that was dismissed, or that ended in acquittal, can be petitioned immediately under NRS 179.255(1). Where prosecution was declined, the petition can come after the statute of limitations has run, 8 years after the arrest, or by stipulation.
Some records are never sealable. NRS 179.245(6) excludes a crime against a child, a sexual offense, invasion of the home with a deadly weapon (NRS 205.067), felony DUI under NRS 484C.400(1)(c), offenses under NRS 484C.430, DUI-related homicide, and felony offenses under NRS 488.410, 488.420, and 488.425.