The accident is still under investigation by the West Goshen (Pennsylvania) Police Department. The initial police press release reported that the "preliminary investigation revealed that speed may have been a contributing factor to the accident."
TMZ reported that the crash was so violent that the Chester County Coroner's office was unable to determine if they died from the impact of the crash itself or from the fire that followed. Toxicology results to help determine the role alcohol played in the crash will not be released for 4 to 6 weeks, according to TMZ.
Dunn had posted a photo online just hours before the crash that showed him and two friends drinking at a local bar.
After the crash, the manager of the bar told CNN, "He didn't seem to be intoxicated at the time he left."
Dunn's passenger in the car, Hartwell, was not a member of the "Jackass" crew. But on IMDB he is listed as a production assistant on the second "Jackass" movie and is credited as "car stunt driver" on Bam Margera's 2009 movie "Minghags."
According to MTV, he was also an Iraq War veteran who had recently married.