A 26-year-old man arrested in connection with a social media threat made to Pierce College Thursday had an assault rifle, several rounds of illegal ammunition and illegal high-capacity magazines in his home, investigators said.
Sergio Castanon Jr., a former student of Pierce College, was arrested just before noon, according to the Los Angeles County Sheriff's Department.
The threat was reported by two people around 8:20 a.m. and sheriff's deputies were called to the scene to investigate. The campus was closed at the discretion of the president, and students were evacuated.
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"It's scary that he could have come here and done a lot of damage," student Nik Fields said. "It's a big open campus."
After Castanon's arrest, the school was reopened around 3:30 p.m.
Castanon was booked on suspicion of criminal threats, possession of high capacity magazines and illegal ammunition.
He is being held in lieu of $50,000 bail.