(AP) — A 19-year-old man has been given nearly a year in jail for trying to force his way into Lincoln North Star High School last year.

Online court records say William Holloway pleaded guilty to assault, trespassing and disturbing the peace. Prosecutors dropped three other charges in exchange for Holloway’s pleas. He was sentenced on Thursday in Lancaster County District Court.

Prosecutors say Holloway and two friends fought with two guards and a school administrator on March 1, 2013, while trying to enter the school. The school was put on lockdown for a time.

Holloway was on parole for robbery, so he was returned to prison for 11 months.