Witnesses said the altercation started over broken glass in the roadway at a mobile home park in St. Clair County.
When deputies arrived, one man was found lying in the street with a gunshot wound and was pronounced dead at the scene, while the gunman was arrested without incident.
Police in St. Clair County are investigating what appears to be a homicide at a mobile home park.
A 46-year-old St. Clair County man could face murder charges in the death of his 26-year-old girlfriend.
The St. Clair County sheriff’s department has identified a woman and an infant killed in a mobile home fire this week, as well as the fire’s cause.
Fire In Casco Township kills 30-year-old woman and infant, injures two other children.