Don’t know at this point...Could be. In fact I don’t think they know for sure who was even sitting in the cockpit on impact. Hard to believe no video feed from the flight decks. Even RTD buses have video.
Could someone have gained access somehow as the pilot exited the CP? Was the door compromised and somehow opened while the other pilot was using the can? I don’t know.
There should be continuous information streaming from the plane, none of this archeological searches for black boxes at the crash site, which in this case one may have been compromised before it was loaded because the memory chip was not found.