"Perfectly true. But the lack of published evidence is no proof that evidence exists either.
Nor does it show that the officers were put under any pressure at all."

Thank you for confirming my point, Nigel, which of course was that there are no publicly-known absolutes in this case, just reported ifs, buts, and maybes. This is what I was trying to demonstrate to our esteeemed and revered (not) Professor, who makes bald statements in absolute terms, despite the fact that 'we' are not in possession of all the evidence', in order to 'win' (which, of course, he doesn't, he just makes himself look sillier).