Christopher D. Brown was 23 when he was fatally shot on December 27, 2016, in Chicago’s Parkway Gardens neighborhood. The area had been marked by significant gun violence, and his death was one of several gun-related homicides in the city that year.

The case remains unsolved. Christopher’s death is remembered by family, friends and online memorials that aim to honor his life and call attention to the wider problem of gun violence.

Did anyone in Parkway Gardens or the surrounding community hear or see anything on December 27, 2016, that could help investigators?