The wrinkling of the skin is consistent with the stress on the fuselage, whether the image is part of the failure sequence or not, imo.
At first glance, the oil canning would be attributed to the high download on the tail. In this case with the one tab and the structural flexing across the elevator, the left elevator is making less tail down force than the right. This introduces torsion in the afterbody and it will show up as oil canning too.
Heard talk of the tailwheel be forced down against hydraulic pressure in the actuator. The maintenance manual shows an uplock and uplocks wouldn't be designed to take torsional loads from the fuselage excessively twisting.
There's also what appears to be denting on the turtle deck aboce the, '1', which would indicate the turtle deck in this area was stressed beyond the elasticity of the aluminum from the fuselage overly twisting.
http://www.avweb.com/newspics/reno-c...rien_large.jpg