4:14 PM PT -- We've obtained photos of BJ's truck inside the auto body shop where it was sent after the accident. We're told the damage on the truck indicates the tire blew, causing BJ to crash into an embankment on the driver's side ... it does not appear the truck flipped, as was first reported.
As far as the investigation, cops say, "There are several cases that include operating a vehicle under the influence of an intoxicant, consuming or possessing liquor while operating a motor vehicle and inattention to driving."
Penn, however, has not been charged with anything, the police statement continues, "When the investigation is completed it will be routed to the Office of the Prosecuting Attorney for screening and potential charging.