Victor Guerrera, 39, was fatally shot in Chicago, Illinois, on January 17, 2016. His death occurred during a year that saw an especially high number of homicides in the city, and Guerrera was one of many victims amid a surge in gun-related fatalities that year.

Authorities increased patrols and launched violence-reduction efforts during that period, though outcomes remained mixed.

Anyone with information about Victor Guerrera’s death or who knew him is asked to come forward with tips or memories that might help shed light on his case.