The student accused of causing a massive lockdown at the University of New Haven is now facing federal charges.
Prosecutors said William Dong, 23, is charged with unlawful transport after he bought a bushmaster rifle in Pennsylvania and brought it into Connecticut in September.
Dong triggered a lockdown at the UNH in West Haven last month after he was spotted carrying two loaded handguns on campus.
Police said he also had the bushmaster rifle in his car.
Investigators said they still don't know why he brought the weapons onto the campus.
Copyright 2014 WFSB (Meredith Corporation). All rights reserved.