Mono, NSF thank you for the reply:
The aircraft came to rest some 2/3rds of the way along a 10,000 ft runway. The wheels and brakes were ground down to just below the wheel brake pad rotors and stators. The recorded touchdown speed was 145 knots (considered high for the configuration)
It is our conjecture that due to the extremely shallow approach - after the initial touchdown the aircraft became airborne - the PIC pushed the nose forward thinking he was fully grounded - when in fact the recorder shows the MLG to be off the ground at this point - The nose wheel touched down hard (recorder) and we think the PIC then applied full braking - shortly after this event the MLG touched down with the brakes locked (as they would be) and the rest as they say is history.