ORLANDO, Fla. — A Florida university student is being sent home to China because police say he exhibited “disturbing behavior,” and bought a second assault weapon after coming to the attention of police.

University of Central Florida Police say they spoke with 26-year-old Wenliang Sun in early February after he made unspecified “unusual statements” to a counselor.

The Orlando Sentinel reports Friday he also stopped attending classes, dyed his hair and bought an expensive car. UCF Police Chief Richard Beary said these actions, taken together, raised alarms.

Because he was not attending classes, his student visa was revoked and he was taken into custody last month. An immigration judge last week ordered him deported. He remains jailed awaiting deportation.

Beary said investigators believe “we just saved a bunch of lives.”