So, with this scuffle going on behind him, and the gunshot having blasted in this enclosed space, did Charles Dhority decide to just sit in the car and hold his foot to the brake? Obviously, he did pull the car out of there before the ambulance arrived since it would have been blocking the ambulance. I found this shot of the car again.
The illumination is definitely gone now at 13:27, but at what point it ceased between 13:12 and 13:27 is anyone's guess.
And here is the ambulance pulling in. It's headlights don't look as bright to me as the rear light we saw from Dhority's car.