Authorities are investigating a brawl that led to a fatal shooting at the Skate 22 roller rink in Union, NJ. The Union County Prosecutor's Office says that 100 people, ages 13 to 25, had been attending a party, "At some point before the shooting, there were two groups of people fighting, words were exchanged and shots rang out." The victim was reportedly a 15 or 16 year old boy who was shot in the head. One witness said groups of girls had been fighting throughout the night and the shooting then resulted in a stampede out of the facility. WABC 7 reports while many of the party goers were held as police searched for the gunmen, "Police were investigating the possibility that several armed men fled the rink in the chaotic rush following the shooting."