@AS365N4:
Not quick but very thorough.
They estimate mid April for the initial report.
I personally think they´ll be a week or two faster than that but it takes some pressure of the investigators.
Tragedy but still fortunate that there was "only" one casualty and 4 or 5 injured.
As I read today the crashed Puma carried 16 pax.
The killed pilot was sitting in the EC155 and was apparently killed by a rotor blade hitting the cockpit.
(Source: Berliner Morgenpost)
Tom