That is very tragic.
I would´ve escaped through the trunk, there is a safety "Pull" - Handle in there. You can always get out of the car through the trunk.
I however have an emergency hammer inside the car, you never know. If you drive into a lake/river/ocean you wont be able to open the doors, and when the electric jams up you re trapped. Braking a Cars window without a tool is almost impossible. Even with a tool it is pretty tricky: