[SolidSnake84]

I'm sorry for pointing out speculation as fact, but all we know so far is that homicide detectives were called to the scene last night to collect evidence and try and re-create the accident, etc...

There were tire tracks in the front yard...so my most educated guess is that she went to drive off..she peeled out in the front yard (making the tracks). Chris ran after the truck....jumped in the back...and when she realized he was in the back, she started swerving to try and throw him out (thereby making the swervy skid marks in the road that police found)....she succeeded in throwing him out.

Thats just my take on what happened.