Martez Mayo was 20 when he was fatally shot on January 31, 2018, in Chicago’s Roseland neighborhood. The shooting occurred during an exchange of gunfire that also left one other person injured. Mayo was pronounced dead at the scene from a gunshot wound to the head.

Police say the killing fits a broader pattern of violence in the area. Despite investigative efforts, no arrests have been announced and the case remains unsolved; progress has been hindered by a lack of witnesses willing to come forward. Mayo’s family and community members have held vigils and rallies calling for stronger action against gun violence.

Anyone who knew Martez, was in the Roseland area that night, or has information that could help the investigation is asked to come forward.