When I see that a car accelerated to an unsafe speed, went off the road, hit a tree, and burned, and then later find out that the driver was drunk... manufacturing defect is pretty low on my list of causes. I'm not disagreeing that Tesla might hold back incriminating info IF they had any, but in this case with a very short drive, quick fire, and it already being established that the data card in the car was burned, they may simply have no log data close enough to the crash on this one. There is evidence to support this as well: Elon did respond saying AP could not be used on that road and we know it wasn't. If he had actual logs to prove that, he would have likely said that the logs show AP was not being used. Instead he had to go by road conditions and how AP works, probably because they don't have logs due to the car crashing before the logs could be transmitted wirelessly.
Mike