Thanks for the photos. It seems that just about everything is bent except for the Tail rotor blades. So they were more than likely not turning at impact. These are the Orginal "C" model Agusta tail rotor blades. Seeing the driveshaft cowling open the inspectors were obviously looking for the cause of no rototational blade damage.
I pray the pilot has a speedy recovery from this and a discovery of what occured is found. While most accidents are of some type of Pilot Error this seems to be a obvious mechanical part failure.
Godspeed.
Brent