Robert Bobby Christman was 19 and a college student when he was shot and killed in downtown St. Louis on Sunday, January 11, 2015. He was sitting in a parked car near the City Museum with two other young people when an armed assailant opened a passenger door and demanded a purse. After one occupant resisted and Christman made a remark, the gunman fired a single, fatal shot to Christman’s head and fled in a gray or silver sedan.

Police later identified and arrested a suspect, Christopher Grant, who was charged with second-degree murder, armed criminal action, and attempted robbery and pleaded guilty to those charges. Grant was sentenced to 25 years in prison. Christman, who had registered as an organ donor at 16, helped save several lives through organ donation, a detail his family highlighted while thanking police and prosecutors for their work.

Did anyone who was in the City Museum area that Sunday remember seeing a gray or silver sedan or any suspicious person near the parked cars?