Lack of something can not make me "so hopeless at solving this case" unless I intend to solve the case.
That's how you failed again.
Get it now?

I've just noticed the "tell" proving Weidmann is, indeed, Beck.
It's been bugging me for a while that Weidmann doesn't realise it's "cannot" and not "can not".
It's hardly a coincidence that Otto displays the same basic illiteracy.
#busted