As of now, it seems as though the crash occurred as he was traveling over 100 mph. Another body, yet to be identified, was found with him.
Dunn may not have been a shining role model of any sort, but he brought laughter, joy, and warmth into countless people's hearts. And that makes him nothing short of a hero.
I like to think Dunn went out just as he'd have wanted - acting like a jackass.