Published: Dec 04, 2013 4:26 PM EST

WEST HAVEN, Conn. (AP) - Authorities say a Connecticut college student arrested carrying two handguns on campus also had an assault rifle in his car, and police found 2,700 rounds of ammunition and newspaper clippings of the Colorado theater shooting at his home.
    
Twenty-two-year-old William Dong was arraigned Wednesday. A state judge ordered a mental health evaluation. Dong is detained on $500,000 bail on charges including illegal possession of an assault weapon.
    
No shots were fired in Tuesday's scare on the University of New Haven campus in West Haven. Police aren't sure why Dong brought guns to campus but say he had permits for the handguns.
    
Police say that in Dong's padlocked bedroom at his Fairfield home, they found the ammunition and newspaper stories about the Aurora, Colo., theater shooting that killed 12 people and wounded 70 last year.

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