The driver’s car had broken down and he was crossing the interstate when he was hit by a Mazda. The victim went through the window and landed in the passenger seat. The accident occurred at 12:30 a.m. and the driver reportedly was pulled over later . . . with the dead man still in the seat. Police said that he told them that he thought he might of hit something on the Interstate.
This is not the first time a victim was driving away from an accident (here and here). I will assume given the statement and the time that alcohol is involved, but there is not yet a full report.
Source: Chronicle