Can a car that has been parked and the switch turned off for 8+ hours catch fire spontanously?

A Ford Lobo caught fire at 4 am, after being parked at around 7pm, can it be because of an unknown electrical failure? Or should we suspect foul play?

pedro7of92012-08-13T13:09:03Z

yes to both
cars DO catch fire fro bad starters,,loose wires and other things,,,but more often arson,,,the cops arson investagator can tell easily