As a matter of law, concluding that a pilot is a murderer is wrong, but disclosing facts that strongly suggested that the pilot is a murderer is perfectly legitimate. It is for the courts to make these kinds of conclusions... preferably after a trial.
As a matter of French law, there's not going to be a trial. What punishment could they impose?
In this case, disclosing as much information as is known, as early as possible, is a kindness to the relatives. They know their loved ones are dead; what they want are explanations.
As do we all, I suggest.