The move came only hours after police released grainy surveillance photos of a man wearing a striped baseball cap, light blue jeans and a blue and orange jacket. The San Francisco medical examiner has determined that the human remains found inside a suitcase abandoned on a downtown street belong to an unidentified light-skinned man. Homicide investigators went door-to-door Thursday in a San Francisco neighborhood looking for surveillance camera video — or anything — that could be a clue to the case.