So, as always, its best to let the facts come in. Sounds more like a murder/suicide now.
" The crash
made headlines because no one was found in the driver's seat, raising suspicions that Tesla's Autopilot driver-assistance system was involved in the deaths. This now seems unlikely—the NTSB says that video footage shows the occupants getting into the front seats of the car shortly before the crash. Additionally, the NTSB was unable to engage a component of Autopilot on the stretch of road where the crash happened.
The crash occurred on April 17 in Spring, located in Harris County, Texas. According to the NTSB report, footage from the owner's home security system shows that the driver and a passenger entered the car at the owner's house. They then traveled approximately 550 feet (167 m) "before departing the road on a curve, driving over the curb, and hitting a drainage culvert, a raised manhole, and a tree." At this point, the Tesla's lithium-ion traction battery was damaged and caught fire"
Was the person found in the back of the car trying to manually release the door?
arstechnica.com