Ramon Colon, 24, was fatally shot on March 6, 2013, in Chicago’s Humboldt Park in what appeared to be a gang-related incident. The neighborhood was experiencing a surge of violence at the time, with heightened tensions between rival gangs and an overall spike in citywide shootings during 2013.

Reports say Colon may have been connected to circles at risk for gang-related violence, but specific circumstances of the shooting remain sparse. A memorial held for Colon in Humboldt Park was marred by additional violence, underscoring how retaliatory acts and public gatherings often fed the cycle of shootings in the area.

Anyone who knew Ramon, saw events around March 6, 2013, or has information about the shooting or the memorial is asked to come forward.