2017 Cadillac XT5 drivetrain & axles problems

Tl* the contact owns a 2017 cadillac xt5. While the contact's wife was driving at a low rate of speed, the vehicle shut off without warning. After restarting the vehicle, it shut off yet again. After the second restart, the vehicle accelerated independently without warning. The contact's wife attempted multiple times to depress the brake pedal and shut off the vehicle using the push start feature, but was unsuccesful. As a result, the contact's wife crashed into an embankment at an unknown rate of speed.

Tl* the contact owns a 2017 cadillac xt5. When the brake pedal was depressed, it traveled to the floorboard and the gear shifter would not move into park. Also, the service engine, service stabilitrak, service transmission, and entire instrument panel warning indicators were illuminated. The battery was disconnected and reconnected and the vehicle was able to shift into park; however, it unintentionally went back into drive.