BENTONVILLE, Ark. (AP) - A former student at John Brown University pleaded not guilty to a felony charge involving the use of explosives.

Timothy Constantin, 20, was charged Tuesday in Benton County with criminal acts involving explosives. He was released on a $75,000 bond.

Siloam Springs police said they received a call in November about a suicidal person making comments about committing a mass shooting or bombing.

A probable cause affidavit shows police and university officers went to Constantin's dorm room and found firearms and ammunition. They also allegedly found a note revealing he wanted to commit mass violence because of his hatred for society.

The affidavit says Constantin later told authorities he would use explosives if he wanted to commit a mass killing.

University officials say Constantin isn't currently enrolled in classes.