- Associated Press - Tuesday, June 21, 2011

PHILADELPHIA (AP) - Police in southeastern Pennsylvania say autopsy results on “Jackass” daredevil Ryan Dunn could take a week.

The 34-year-old Dunn was killed early Monday in a fiery car wreck in suburban Philadelphia. His 30-year-old friend and passenger, Zachary Hartwell, also died. Police say Dunn’s Porsche might have been traveling as fast as 100 mph at the time of the crash.

West Goshen Township police declined Tuesday to discuss the investigation.

Mourners are placing flowers at the scene of the crash in West Chester. Police say Dunn’s car jumped a guardrail, flew into a wooded ravine, struck a tree and burst into flames.

Hartwell is credited as a production assistant on the movie “Jackass Number Two.”

Dunn posted a photo on Twitter of himself drinking with friends just hours before the crash.