The truth is that 'we' don't know what evidence exists (and that includes you, Professor Feeblemind) - just because it hasn't been put into the public domain doesn't mean that it doesn't exist. And 'we' don't know what pressure has been brought to bear on the officers at the time, and since, to keep the sordid business quiet.

You see, Prof., although your feeble mind appears incapable of understanding it, the lack of published evidence is no proof that there exists no evidence at all.