@searchingforanswers
you possibly read the date wrong, since it's all in German. Here's the proper report, posted in November 2011:
Beech accident December 2009
That shows you how long it can take before the reports are finished. Of course there is already a lot of speculation, but until every single piece of the aircraft is studied for possible technical problems, it can take months before a final report can be published.
It's a difficult time for you and your's, I'm sure, making it hard to be patient. Sorry I can't help you any further.