According to WGN News, Detectives believe the incident stemmed from a fight between two groups at a gas station. Both groups arrived in separate cars, Chicago Police spokesman Anthony Guglielmi said. A fight escalated. Detectives are viewing surveillance video.
A 25-year-old man was killed. Two victims are in critical condition: a 20-year-old man and a 24-year-old woman who was shot in her neck. The fourth victim, a 37-year-old man, was shot multiple times in his body; he is in serious condition.