East Orange police say no arrest had been made by late Sunday morning. The party was held late Friday night into Saturday morning at a home on South Clinton Street, about a mile from the Seton Hall campus.
The slain student was 19-year-old Jessica Moore of Disputanta, Va. Four other people, including two Seton Hall students, suffered non-life-threatening injuries.
Police and witnesses say the suspect was kicked out of the party because he didn't want to pay the cover charge. They say he left but returned with a gun, walked into the party and started shooting. In the chaos, he got away.
A spokesperson for the Essex County Prosecutor's Office said that no one has been arrested but the investigations is rapidly moving forward.
An electronic sign near the shooting site advertises a $10,000 reward for information leading to the suspect's capture.