Two gunmen walked up to a 67-year-old man and fatally shot him Tuesday afternoon near United Center. The man was outside in the 2100 block of West Madison Street when two armed assailants on foot pulled guns and opened fire, police said. He was hit in the head and taken to Stroger Hospital, where h e was pronounced dead, police said. Area 3 detectives are investigating. Chicago Police Department officials investigate a homicide in the 2100 block of West Madison Street on the Near West Side on Tuesday.Ashlee Rezin/Sun-Times A child walks by as Chicago Police Department officials investigate a homicide in the 2100 block of West Madison Street on the Near West Side on Tuesday.Ashlee Rezin/Sun-Times ...read more read less