Police are on the lookout for a Michigan man who has been pooping in unlocked vehicles in Warren over the last few months. The first incident happened in November at Mr. Friendly Auto Service when some employees discovered poop inside of a van that they were storing in their lot before they had a chance to work on it. The man, now known as the serial pooper, hits auto shops and garages and looks for unlocked cars to poop in. The second incident occurred in January at a tire shop when the serial pooper found a car that was unlocked due to an electrical problem. Those are the only two times he struck, but he has been seen two other times lurking around cars looking for unlocked doors.