Officers arrested 18-year-old Sharome Kruz at 11:47 p.m. on Friday. They also picked up two 15-year-olds, but since they're juveniles, their names aren't being released.
All three are accused in the shooting death of 54-year-old Michael Robinson, a resident of Peoria's South Side.
Police got a call for shots fired in the 2200 block of Starr Wednesday night. They arrived and found two men with gunshot wounds to the head. One of them was Robinson, who the coroner pronounced dead on scene. The other is recovering from serious injuries.
The three are also being held for armed robbery. Officers are looking for one other person.