Stanley Carter, a 59-year-old Army veteran and former Army Ranger who held a black belt in karate, was killed on the morning of September 16, 2015, while waiting for a bus in Highland Park, Michigan. Around 5 a.m. he was among a group at a bus stop in the 11800 block of Woodward Avenue when an assailant approached, robbed him and shot him once in the chest. Carter collapsed in a nearby parking lot and later died at a local hospital.

Police developed a person of interest and, with tips from the public, arrested 50-year-old Malcolm Benson at an apartment in the Palmer Park area. Investigators say Benson was a parole absconder who had been released earlier in 2015 after serving 20 years for a 1995 second-degree murder, and that he had sexually assaulted a woman shortly before killing Carter. Benson was charged with first-degree murder, armed robbery, first-degree criminal sexual conduct and firearm offenses; he was convicted of felony murder and later sentenced to life without parole for Carter’s killing.

Did anyone in Highland Park that morning see or hear anything that could add detail about what happened at the bus stop?