Don’t think so, Gov Brewer liked him and the Evil Witch Napolitano was in D.C.
1) I vaguely remember during the Arkancides in the Clinton regime, that somebody rigged a car to suddenly accelerate and the guy in it drove straight into a brick or cement wall. I don't know how they triggered it. (IIRC it was the son of the man who married Vince Foster's widow and claimed to have found some of Vince's papers in her attic and wanted to talk about it.)
2) A person hiring a hit can make the deal from pretty much anywhere.
3) I think there was at least one other pertinent single car fatal accident during that time in Arkansas.
OTOH actual accidents DO happen. It becomes suspicious when the victim is one of the major effective protectors of our sovereignty at a time when people (in both parties) are working so hard to destroy it.