Marnay Haynes was 16 when she was shot and killed on the night of September 13, 2021, in the 9900 block of Glen Owen Drive in unincorporated north St. Louis County. Gunfire-detection alerts first brought officers to the scene; investigators said she had been struck in her arm and head and was found down in the roadway and pronounced dead there. The killing occurred amid a string of seemingly unconnected shootings across the region that investigators described as random rather than the result of a single dispute.

Detectives recovered cartridge cases and examined timing and other ballistic details, and law enforcement later said they saw a repeating signature in the gun evidence across separate crime scenes. On November 5, 2021, authorities arrested Perez Deshay Reed, then 25, after tracking him by train; officials said he had a .40-caliber semi-automatic pistol and that shell casings from that weapon matched casings from the St. Louis County scenes. St. Louis County prosecutors charged Reed with two counts of first-degree murder for Haynes and another September killing, plus armed criminal action and related counts.

If anyone knew Marnay, saw activity in the Glen Owen Drive area that night, or has information about the shootings, please share what can help investigators.