I'm still not jumping to any conclusions here, but it seems to me that it looked a lot like an accident yesterday morning and it looks a lot more intentional this afternoon.
I guess there's still a middle ground for some negligence in maintenance that led to this but I think the "burden of proof" just shifted in this case.
My point is that catastrophic failure in one area can lead to more structural failures elsewhere. So it's not necessarily an unlikely coincidence that the tail and the engine all fell off at the same time but rather cause and effect.