The roof that the pilot landed on appears to be a flat structure from photos - am I right?
The reason I ask is that I wonder that given the darkness, would it have been immediately apparent from above that it was in fact a building and not just a dark open space.
Are NVGs used by pilots on this operation?
Power failure of some kind, rapid yaw, or pitch - possibly both, an attempt to regain control and rapidly look for somewhere to put the machine down?
What's the avoid curve for the EC135 T2?
I should add, I'm not inferring pilot error or blame in anyway.
It must have been nightmarish.