19-year-old Shahaid Smith is one of three people suspected of forcing their way into a room in Deatrick Hall earlier this month.
One of the dorm residents was pistol-whipped in the incident.
Smith, a native of Crum Lynne, Delaware County, is a sophomore majoring in special education.
Now he's jailed on charges including robbery, burglary and simple assault.
Police are still looking for the other two suspects.