I think the head gasket's gone, mate

Man uses tow truck, cable to kill self
A bystander called 911 at 4:27 a.m. to report a tow truck driving erratically through...neighboring parking lots along a commercial area off Illinois 116 near its junction with old Route 66. The truck careened through the S&R parking lot and adjacent Superior Gyros parking lot eastward, then struck a sign and crossed old Route 66. It went down an embankment and came to rest behind a business on the other side of the road.
When police arrived they found a body in the truck but no head. The head was back at the repair shop, having been sliced off by the driver in a bizarre suicide.