Jamarr Mack Jr. was 14 when he was fatally shot on the evening of October 24, 2016, in the O’Fallon Park neighborhood of St. Louis. He was walking in the 4300 block of Lee Avenue, reportedly returning from a nearby library, when residents heard gunfire around 7:45 p.m. Officers arrived about 7:59 p.m. and found him on the sidewalk with multiple gunshot wounds; he was semi-conscious and breathing but unresponsive and died after being taken to a hospital.

Homicide detectives canvassed the area for witnesses and evidence. If anyone knew Jamarr, saw him that evening, or has information about activity on Lee Avenue around 7:45 p.m. on October 24, 2016, please come forward.