I'll hazard a guess. The tail section is probably too big to have been sheared off by flying debris. Ergo, unless there was an explosion, it would have to have been torn off by aerodynamic forces as the plane spiraled out of control. But, in that case, the first thing to go would have been the stabilizer, as it has the largest surface to volume ratio of the tail section, and the most fragile structure. Since the stabilizer survived, the tail did not come off due to aerodynamic forces, but due to an explosion.
Sound reasonable?
Sound reasonable?
No. It was intact (minus the rudder) but broke off cleanly, and not scarred, suggesting it was aerodynamic stress, shearing the bolts. It wasn't struck by anything (at least on the right hand side, which is the side we saw in the pictures yesterday).