well, according to this link:
she didn’t die in the car.
Edwards was taken into KPD custody for refusing to leave Fort Sanders Regional Medical Center. She had come to Fort Sanders the day before, complaining of abdominal pain and being diagnosed with constipation at Blount Memorial Hospital. After spending the night at Fort Sanders, she was discharged around 7 a.m. on Feb. 5.
After she refused to leave, hospital security called KPD to have her evicted from the property. The responding officer, Wardlaw, decided to take her into custody after speaking with her. Wardlaw, along with several other officers, then tried to put her into a KPD wagon, but decided it was too high off the ground for Edwards, who was in a wheelchair, to get into.
From there, the officers called in Distasio’s patrol car, which they loaded Edwards into. On the way to a detention center, Distasio responded to a reckless driver. While he was stopped, he noticed that Edwards had become unresponsive and an ambulance took her back to Fort Sanders. From there, Edwards was placed on life support before she died.
An investigation by the DA’s office found that Edwards died of a stroke, clearing the officers of any criminal charges.
She did. They're trying to cover it up, but I watched the video and you can hear her die at the 1:08:30ish mark.