Adrian Sianez, 24, was shot dead in Chicago’s Gage Park neighborhood on September 8, 2013. He was standing on the 5500 block of South Mozart Street at about 3:40 a.m. when a gunman exited an SUV and opened fire. Sianez was struck multiple times in the back and buttocks and was pronounced dead at the scene despite a rapid emergency response.

Authorities described the killing as believed to be gang-related, and it came amid a sharp rise in violence across the city that year; his death contributed to Chicago reaching 300 homicides. Neighborhoods like Gage Park were repeatedly cited for gang activity during that period.

If anyone saw activity on South Mozart Street around 3:40 a.m. that morning or has information about the shooting, please share what is known.