Tire Tread/belt problems of the 1999 Buick Lesabre

My spouse was driving her 1999 Buick Lesabre east on interstate I-10 from slidell, la to gulfport, ms when the driver side rear tire lost it's tread. This caused her to lose control of the vehicle which veered left into the central median; made two 360 degree spins on the grass; and moved off the median and back across two lanes of the highway to stop on the right side bank of the road. Although the tire was partially inflated, the entire tread was gone. The damage to the auto included the following; torn rear bumper, metal damage to inner wheel well; wheel well lining torn out; well arch steel trim piece ripped off; and paint removed from rear fender and read door panels. My spouse received damage to shoulder and back muscles.