John Mackey was 18 when he was fatally shot on February 4, 2016, in the Humboldt Park neighborhood of Chicago. His death occurred during a year that saw a sharp rise in homicides across the city, a surge tied in local accounts to increased gang activity, more firearms in circulation, and limited community resources.

Humboldt Park’s history of gang conflicts and street violence is noted as the context for the shooting, and investigators faced difficulties in many 2016 cases because of a lack of cooperation from witnesses. Mackey’s family was left grieving amid a broader cycle of violence that strained law enforcement and community responses.

Does anyone who knew John or was in Humboldt Park on February 4, 2016, have information that could help shed light on what happened?