LOS ANGELES (AP) — Classes have resumed at UCLA after a former lecturer was arrested on suspicion of threatening violence against the school in online videos and an 800-page document sent via email.

Classes were remote on Tuesday and were in-person again on Wednesday. Matthew Harris was taken into custody Tuesday in Colorado following a standoff at his Boulder apartment complex that ended peacefully.

Months before the threats against UCLA, court documents show Harris was the subject of a restraining order after sending threatening messages saying he would “hunt” and kill a professor.

It wasn’t immediately known if Harris had a lawyer who could speak on his behalf.