4. Conversely, strong statements by a person in a position of supervision over an investigation may 'set' minds and hinder the careful unearthing of alternative explanations and chain of events.
Prosecutor's statements do seem to be unnecessarily conclusive at this stage... surely the circumstances of the descent or the prevention of entry to FD require further investigation and facts to properly establish "intention".
If there is other conclusive evidence or facts to support the allegation of intent there would appear little reason to conceal them. Surely any statement should include the reasons for such a conclusion. I do not see that the published facts establish any more than a strong likelihood at this stage; there still remain other possibilities.