A 19-year-old suspect remained in custody on Sunday.
Investigators are trying to determine if others who fired weapons did so in self-defense or if they were aggressors.
The shooting just after 1:30 a.m. Saturday came as students were getting ready for the new school year.
The suspect is not a student but was found hiding in a dormitory closet Saturday afternoon.
He faces four counts of malicious wounding and four counts of using a firearm during a felony.
Only one of the victims is a student.
