A prosecutor says a New Hampshire prep school graduate convicted of sexually assaulting a 15-year-old classmate has violated curfew at least eight times and should have his bail revoked.

Owen Labrie has been living with his mother in Tunbridge, Vermont, as he appeals his one-year jail sentence and the requirement that he register as a sex offender. He is supposed to be home between 5 p.m. and 8 a.m. each night.

In court papers Monday, prosecutor Catherine Ruffle says on or about Feb. 29, a journalist spoke with the 20-year-old Labrie on a train in Cambridge, Massachusetts. That prompted an investigation into Labrie's travels.

A phone message seeking comment was left with Labrie's attorney.

Labrie was arrested days after graduating from St. Paul's School, an elite prep school in Concord.