Ryan Matthew Addison, 28, was fatally shot just after midnight on Tuesday, August 11, 2015, while walking in the 200 block of Elmira Street SW in Washington, D.C. He was discovered with gunshot wounds, taken to a hospital and pronounced dead. Addison worked as a security guard, had no criminal record, was planning his wedding and was preparing for a clerical job interview with the federal government.

Investigators concluded the shooting was a case of mistaken identity. Authorities say a suspected member of the Imperial Gangsta Bloods, Joshua Artis, allegedly carried out the shooting that day as an act of revenge ordered by a gang leader after the earlier killing of Rodney Davis. Addison was not involved in that earlier killing and appears to have been targeted solely because he was on the same block where the actual suspect was believed to live. Artis faced charges including first-degree murder while armed, firearms offenses, conspiracy and obstruction; regional gang leader Travell Vandiver was implicated for allegedly authorizing the attack.

Did anyone in the Elmira Street area that night see something that could clarify how Addison came to be mistaken for someone else?