eezeegeebee
As soon as the prosecutor has sufficient evidence to satisfy himself that a crime was committed and it was NOT an accident, ICAO Annex 13 ceases to apply.
I rather think the same would be the case in the US where the FBI are always involved treating crash sites as crime scenes. They would not sit on their hands waiting for a year or so for NTSB to publish a report if it became apparent that it had been a crime; they would take over and treat the incident as a crime that they need to investigate and if that required publicity that is what it would get.
It is obvious from the quotes you gave and a lot of responses like yours on here that you do not want this to be shown to be a murder suicide. However, there is an extremely high probability that it was. As that is the case it is the duty of everyone involved in the various criminal and Annex 13 investigations to pass the known information to aircraft operators and regulators - for them to take appropriate action within their areas of responsibility to mitigate any similar risk. They can't pass on that type of information without stating what they think happened based on the CVR and other information. They have not released a full transcript just enough to justify their position that the incident has an extremely high probability of being a crime. How else can they warn operators of the risk they need to mitigate??