Hoa Le, 37, was shot multiple times around 2 a.m. and died at the scene in the 6200 block of Michigan.
Police say an armed suspect announced a robbery and began shooting, injuring a 50-year-old man, a 34-year-old woman and the child.
55-year-old Gregory Muse was convicted in April
The man walked into the store around 4:30 a.m., showed his knife and said, “It’s not personal,” then demanded cash from the register.
Antonio Muldrew, 36, is charged with first-degree murder, first-degree assault, first-degree robbery and armed criminal action.
A suspect pulled a gun on three customers and the clerk outside the store in the 8400 block of Local Hillsboro Road around 2:28 Saturday morning.
Craig Pomerlee, 32, of East St. Louis is charged with five counts of armed criminal action.
Steven Khoury is charged with with first-degree robbery, first-degree burglary, third-degree assault, felonious restraint, and two counts of armed criminal action.
The St. Louis Circuit Attorney says 39-year-old Davion Williams killed 41-year-old Darnell Jones at the First Western Inn Motel in April.
Detectives from four St. Louis County police departments are trying to confirm suspicions that the same man is responsible for four armed robberies at four gas stations in four days.