Dang, Sherlock, you got me.
Okay, the car had a really kick but heater?
The perp’s necktie got caught in the fan belt?
He ran himself over?
http://www.clickorlando.com/news/man-arrested-after-running-himself-over-crashing-into-home-fhp-says
Choked out, most likely.
Arm chair detective, good fun.