Larry ,
I looked at the photos of the wreckage. I don't know anything about aircraft but the cause of the crash seems obvious . The attachment points consist of a pin boss,pin, and bore through the vertical stabilizer.
Look at the bore and you'll see it's split in half.
The pins didn't break, The pin bosses didn't break or tear off. The picture shows three of the bosses. One is empty the other shows a short piece of stabilizer and the third shows a longer piece of stabilizer. The bore in the stabilizer looks like it contained a metal bushing-you can see a ring around the bore. Also in the picture of the aft attachment point I think you can see one of the bushings. They may not have successfully bonded the metal to the carbon fiber. The longer piece of stabilizer suggest it was acted on over a longer period of time- it was worked back and forth. It appears the failure started on the starboard side -probably aft- then tore forward across and back. If by some odd chance this is correct then they need more attachment points or they need to move the bores to ad more meat between them and the pins.