Peter Lee Jackson Jr., 20, was shot and killed on September 5, 2021, in the South Shore neighborhood of Chicago. The shooting happened about 2:45 p.m. while Jackson was inside a vehicle parked in the 7800 block of South Clyde Avenue. Chicago police and the Cook County medical examiner’s office reported he suffered a fatal gunshot wound to the head and was pronounced dead at the scene.

Investigators say the killing took place during an illegal gun sale. Surveillance footage allegedly shows Jackson meeting 19-year-old Daveon Houston in a nearby alley, opening a bag containing a firearm and ammunition, and then returning to Jackson’s red Ford Focus. Video described as grainy reportedly shows Houston raising his hand behind Jackson’s head inside the car, two shots, Jackson’s head slumping forward, and Houston fleeing after appearing to search Jackson’s body. Two 9-mm shell casings were recovered from the vehicle and police later found a 9-mm handgun at Houston’s apartment.

Houston was arrested and charged with first-degree murder and unlawful use of a weapon. Prosecutors presented surveillance video and text messages that investigators say show Jackson selling the gun and ammunition to Houston, who told police he believed Jackson intended to rob him. Does anyone have information about Jackson’s movements that afternoon or about the sale that could help clarify what happened?