1999 Chevrolet Astro cruise control problems

While driving 40 MPH vehicle stalled. Then, vehicle suddenly accelerated. Consumer applied the brakes, but they were inoperative. This caused the vehicle to crash into a tree. Upon impact, both frontal air bags failed to deploy. Driver and two passengers sustained major injuries, and were transported to the hospital by ambulance. The vehicle was towed to a garage.

Had cruise control engaged prior to entering a reduced speed area and it functioned normally. After departing the reduced speed area, I engaged the resume function and the vehicle accelerated past the set speed and kept speeding up. I was able to control the vehicle with brakes although they got very hot and smoked severely. Attempts to turn off the cruise control failed, as well as turning off and removing the keys from the ignition.