Matthew Vonderau was killed in a single car accident when the truck he was driving went off the road, hit some trees, and flipped on County Rd 1 near Hickory Gate Dr.  Vonderau was ejected from the truck, which means either he was not wearing his seatbelt or his seatbelt failed.  Ejection – or worse, partial ejection – is the most common cause of death in a rollover accident.

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