Airbus have the full record, the complete CVR, DFDR etc. yet you are to suggest they do not control the outcome? Only BEA have also the records. The ones who do not disclose, create no more havoc than those who allow the suppression of information....satisfaction short of all the information is the sign of a partisan, a benefactor, even.
Normally (at least I hope) legal experts appointed by the judge hearing the case must also be in possession of all these evidences (includes access to parts of the plane recovered and postmortem analysis)
If this is not the case (which I do not think) it would be a very serious problem
(how do appraisal work if there is no evidence and documents to appraise? )