Without the CVR the MSR990 crash investigation by the NTSB in 1999 would not have come to this:
"Two weeks after the crash, the NTSB proposed handing the investigation over to the FBI as the evidence they had collected suggested that a criminal act had taken place, and that the crash was intentional rather than accidental. The Egyptian authorities refused to accept the proposal to hand the investigation over to the FBI, so the NTSB solely continued the investigation." (Wikipedia)