Headless pig dumped in middle school parking lot.

Parents and students at Detroit's Marquette Middle School got quite the surprise when they showed up for school Monday morning.

A dead, headless pig was in the parking lot.

Students told the assistant principal they saw a man drop the pig off.

"A pig? I saw the feet and said, 'What the heck is that? Who would do something like that?'" asked mother Kinny Smith.

Within an hour, the Public Works Department sent a crew to the school.

Workers put the pig in a bag and hauled it away.

Police want to know who's behind this cruel, disgusting prank.