A man was arrested on a charge of indecent exposure after allegedly pleasuring himself in a public library in front of two girls, according to police in New Jersey.

25-year-old Mitchell Richtman was arrested after being accused of going into the Mercer County Library and masturbating in front of two 12-year-old girls.

The girls told the librarian about the incident, and a complaint was filed with the police.

He was charged with one count of indecent exposure and now sits in jail with a $50,000 bail.

He’s already on New Jersey’s Sex Offender Registry stemming from run-ins in the past.