Does anyone else not see that a helicopter without the blades turning cannot fly? Are you proposing they seized solid in flight? Do you know the effect this would have on a helicopter? It would of disintegrated in flight.
The impact shows it did not strike the ground in full free fall, the damage would of been much, much worse. In my opinion the head was producing some lift at, or shortly before the impact, therefore it had to be turning.
As for witness statements, they aren't worth the paper they are written on. As proved by Psychologists the world over. 10 witnesses, 10 versions, which is correct?
I'm not a pilot, but I am a type rated LAE on the EC135 for many years, I know how the aircraft works intimately.