On August 1, 2010, Michael J. Chatman, 22, was killed in a drive-by shooting on the 8400 block of South Euclid Avenue in Chicago’s South Side. The shooting happened around 2:39 a.m. near a party in the Avalon Park neighborhood. Michael and his close friend Reginald Riley, also 22, both died; two other men in their 20s were shot and survived.

Both victims were graduates of South Shore High School and worked together at a rail yard. Investigators treated the attack as linked to gang activity and considered retaliatory motives, but no immediate suspects were identified and a lack of witnesses willing to come forward hindered the probe. Michael’s death was part of a string of summer drive-by shootings that year in Chicago.

Does anyone who knew Michael or Reginald, or who was near Avalon Park that night, have information that could help?