At first, I thought he tried to escape and was trapped. Good shoot.
Then I thought, why not stay on the road until a well lit location or police station. If it were me, the last thing I would do is turn into a cemetery trap at night. Then, I realized the dead and injured had not exited their vehicle. The shooter shot the driver through the driver's side window and the passenger through the passenger's side window.
I wasn't there. Those involved are the only ones that know what happened.