An Oklahoma man is behind bars today for being a crappy crook -- literally.

Charles Marqull Williams was arrested after breaking into a home and leaving behind some incriminating, and stinky, evidence; his poop!

Williams broke into a house in Oklahoma City and ransacked the place, but decided he needed to do his business before hitting the road.

When the family got home, they found their house robbed and their toilet violated.

Cops who arrived at the scene bagged the floater, as well as a piece of used toilet paper that he'd tossed on the floor, and matched the DNA to the state database of repeat offenders.  The doo-doo head is now in jail facing a first-degree burglary charge.

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