Fenger student Fred Couch, 16, was reportedly standing outside the store when someone walked up and shot him twice in the back.The gunman ran off and got into a grey vehicle that fled the scene.
Chicago police have surveillance video of Wednesday night's deadly shooting, but they say it doesn't appear it will help them identify the gunmen.
At a news conference Thursday night, police disclosed that the victim had had run-ins with law enforcement.
"We are reminded once again of the dangers of guns, gangs, and drugs, as well as the seriousness of youth violence. Mr. Couch had a history with gang and gun violence, including several weapons-related charges, and self-admitted gang affiliation," said Deputy Chief Dana Alexander, Area 2 Patrol Division.
Another Fenger student was shot Wednesday in a different incident but survived.
A crisis intervention team will be in the school Monday, when classes resume.
