The man who was run over and killed by a fellow attempted robbery victim in Capitol Heights early Sunday morning had stopped to talk to an acquaintance when three masked and armed men approached and ordered him to lie on the ground, police said late Monday. One of the would-be robbers then walked up to a white sedan parked nearby, ordering the woman in the driver’s seat to give up her keys, police said.

The new details, which Prince George’s County police posted on the department’s blog late Monday, provide the fullest account yet of how 30-year-old Comcast installer Bradford A. McCoy was killed by a fellow victim in the bizarre attempted-robbery-gone-awry. McCoy, who did not know the woman in the sedan, lay down in the 1200 block of Oates Street as he was told, police have said. The 28-year-old driver, not knowing McCoy was in front of her car, ran him over as she tried to get away, police have said.

Police have characterized the incident as a “tragic accident,” saying they will not charge the woman in the sedan. They said they are still searching for the would-be robbers, who fled in McCoy’s Comcast vehicle after the incident. That vehicle, police said Monday, was recovered in D.C.

Family members have said they do not know what McCoy, a doting son and loving father of two, was doing on Oates Street early Sunday morning, or who he was with. In the blog post, Prince George’s police said only that he had stopped to talk to an acquaintance, who was standing with three other men. Police had said previously McCoy was among four other robbery victims, in addition to the woman.

After running over McCoy, police have said, the woman remained on the scene until officers arrived.