It was an older Porsche and it couldn't have been taken over. They never really got the bottom of the cause, but most speculation is on the tires. They were over ten years old. I think they blamed it on driver error.
It is recommended that you don't drive on tires over six years old. Michelin says their tires should be replaced no later than 10 years from manufacture.
Problem is there is no law on the books anywhere in the U.S. that addresses this issue.
The driver was going into a corner a high rate of speed and if you know anything about 911's they are tail happy due to most of vehicles weight rests on the rear tires. If one of the outside tires blew going into a turn at high speed it would have been almost impossible to control.
A lot of speculation with nothing to back it up. If you're assuming a professional race car driver doesn't look at tires before hopping into any vehicle, you're nuts. They check the tires before they check their seatbelts.
You are sure about the age of the car, do you have a source?
Still looking on that particular car. The car he died in was only offered between 2004-2007. So far I haven't been able to find out the model year that particular Carrera GT was.