Re: So now he has admitted to creating nasty malware.
Well everybody lies so that's no biggie.
Let's see, imagine he was the source of wannacry, it did get out of hand and he panicked. Publicly claiming to have found the kill switch is an odd thing to do in a panic situation, activating it quietly and keeping your head down seems the more likely choice.
He has made a full and free confession (no doubt as he was bang to rights) he will no longer be wasting the courts system time, I suspect they will go pretty easy on him.