1993 Ford Explorer tires problems

The left rear tire tread separated from the tire causing the driver to loose control an went into a skid, the vehicle flipped over and ejected the front right passenger, passenger was killed, driver sustained non-incapacitating injuries(texas peace officers accident report, bridgestone/firestone, p235/75r15, radial atx m/s, vdhl10m0184, left rear). Nlm

I recently purchased ( nov 2002) four (4) brand new yks radial a/t lt235/75r15 tires. On jan 02,2003 at approx. 1515 hrs- interstate 40, asheville, nc. I was going east at approx. 65-70 MPH when the left rear tire blow out, causing my 1993 ford explorer to quick turn to the right side of the road nearly missing other cars in the lane. I did not apply the brakes or try to control the truck,but let it move the way it wanted. If I had tied to control the truck, I feel that I would have rolled the truck.