Boeing boy
Wish I was as good as you!! Given a fair hearing by people who do NOT jump to conclusions ( as you have ) it will be revealed that this crew do not have much to hide at all. Assuming this is so (A seperate issue) how do you think the use of the CVR in this case will further the cause of aviation safety? CVR use for prosecutions is contrary to international guidelines and a very dangerous precedent for Pilots.
In a previous case in NZ a Pilot was prosecuted and pleaded guilty because the procesution only had to prove that he could have prevented the accident with the benefit of hindsight. In NZ law there appears to be no requirement to prove negligence, a wreck and a body is enough for any Pilot related accident. A CVR tape if legal is bound to be mis-interpreted and used against a Pilot by Lawers whatever they said.
As for turning a CVR off after an incident this may not be possible if an impact of more than 2 Gs has occured.