[PapaBear3625]

Paul Louis Arslanian, the head of France's air accident investigation agency, said he was not totally optimistic that the black boxes would ever be recovered and said the probe might not reveal all the reasons behind the crash.

Would it be excessively paranoid to think that perhaps they might not want to release an official statement about what caused the crash? If, say, it was terrorism-related?

[allmost]

For an official to preemptively make such a statement, implies they know something. What they know can only be speculated. I would not consider the logic of questioning this odd response as paranoid. Just my opinion.