Maybe they are waiting for the snow to melt so they can verify what is on the recorder.
They probably know fairly well what happened.
They probably have serious concerns in understanding why it happened.
So perhaps there may be some clues in parts of the wreckage that will help confirm what fault pathway occurred to cause loss of the aircraft.
Even with an aircraft as badly fragmented as this one is, you can find control system positional clues from 'witness marks' on adjacent wreckage.
And for HT's benefit, comments policing the English language are over the top on this web site.
We only need to understand the intent behind the post. In this case, cappt appears to be flying the CRJ, so he would really like to have answers to why this aircraft crashed.