In my opinion the actions of several people after the leak kind of prove it.
As you said, the police are not acting. A raid should obviously have been done but there was nothing at all, not even some sort of surveillance.
The owner of the bank in question flew into Malta urgently, went straight to the office, and left with two huge bags. He had no reason to avoid journalists if it wasn't because he's hiding something big.
The PM merely denied every allegation and did not order an investigation to prove himself correct.
Apart from this, what this journalist (or as you call her, the witch) has revealed before about the Panama case and other PEPs was all proven true by the Panama Papers. And really, it all makes sense. Many shady deals or questionable appointments over the past few years fit in with the story. It's like when you finally find that last piece of the jigsaw puzzle that allows you to connect separate pieces.
BTW, last Tuesday:
FCBayernMunchen wrote:I am 99% sure it belongs to the PM's wife.