Mario Guzman, 32, was fatally shot in Chicago on March 31, 2016. His death occurred during a year when the city saw a sudden and sustained rise in violent crime; shootings drove the increase and made up roughly 90 percent of Chicago’s homicides that year. The first months of 2016 saw a 67 percent rise in homicides compared with the previous year, and many neighborhoods were affected by the surge.

Guzman’s killing is reported as part of that broader pattern of gun violence that pushed Chicago’s homicide totals above those of other large U.S. cities in 2016. If anyone knew Mario Guzman or has information about the shooting on March 31, 2016, please come forward.