Police say the victim, 18-year-old Dionte Maxwell, was shot in the chest.
The shooting happened shortly before 11 p.m. Friday on the 8400-block of South Constance Avenue.
Witnesses say the gunfire was part of altercation at a birthday party.
Charles Southern, 19, is charged with first-degree murder.
Chicago police said Sunday two 16-year-olds also were in jail facing armed home invasion and other charges.
A 19-year-old is also in custody but not yet charged in the case.