SPRINGFIELD — Under a new measure proposed at the Statehouse, individuals who have been convicted of a nonviolent crime before their 18th birthday would be able to get their records automatically expunged once becoming of age.House Bill 927, sponsored by Democratic Rep. Curtis J. Tarver II of Chicago, would allow for automatic expungement of nonviolent offenses for juveniles convicted of a nonviolent crime once they turn 18. Nonviolent crimes include drug- and alcohol-related crimes.“What I found in my district …