Spare Tire problems of the 1997 Ford E-350

These tires has to be investigated! I've had 3 blowouts on separate occasions. Tires had 15,000 miles on them. First blowout occurred on highway at 65mph on front passenger side, tire had multiple belt seperations. Put on spare tire of same brand and size and barely got home before the belt started coming apart. Went to firestone dealer, and they sold me another steeltex for replacement. 2 months later went on a roadtrip to California at about 75mph and the front driver side tire tread completely came off and blew out. The van nose dived off the highway out into the desert and almost rolled. 8 people almost were killed. Every time the tire showed same symptoms before failure. Vehicle would be on highway cruising when suddenly it would shake violently and then bam! I am an mechanic by trade and I keep my vehicle in top shape with correct air pressure and rotation, so this is not human or road error. Severe damage was done to the van in the incident. I have since replaced the tires with another brand (bf goodrich) and have had no problems. The firestone steeltex has to be investigated as this is ridiculous aswell as dangerous! I feel I should be reimbursed for the replacement tires aswell as the damages!.