On the evening of May 7, 2011, 19-year-old Michael Williams was killed by gunfire outside the Col Ballroom in Davenport, Iowa, after a rap concert where a fight broke out inside and the confrontation continued outside. Court testimony from a co-defendant, Cazmiere Graves, says that he, Robert Steffon Darnel Williams and Tresvour Trezzie Robertson left the venue together, encountered people involved in the earlier fight, and that Robert Williams allegedly retrieved a handgun and fired multiple shots from a vehicle, one striking Michael Williams.

Investigators arrested several people in connection with the killing. Robert Steffon Darnel Williams was apprehended in Chicago and charged with first-degree murder. Tresvour Robertson was also charged with first-degree murder. Cazmiere Graves later pleaded guilty to intimidation with a dangerous weapon in exchange for cooperating with authorities and testified about the sequence of events.

Does anyone have information about Michael Williams, the people who were at the Col Ballroom that night, or about the events leading up to the shooting?