If you were under age 21 at the time of the offense, each case on your record may be eligible for one of two types of expungement:
The offense is no longer a crime. Examples of these offenses include:
disturbing a school assembly
disorderly conduct by a student
a first-time low-level misdemeanor (such as trespassing)
a violation of a city or town law (such as breaking curfew or being in the park after dusk)
possession of less than 2 ounces of marijuana
You were arraigned for only one charge, ever
Because expungement is based on each charge separately, you may be able to expunge your record of offenses that have been decriminalized before attempting expungement if only a single charge is left.