"Those who protest the loudest carry the most guilt/Those who shout the loudest usually have the most to hide."
Both of those statements are certainly not contrary to this situation. Have you not seen examples where the kid who broke the window is one who claims the most emphatically that they did not do it. 
 Trump expressing so strongly that he is innocent is not doing so with any evidence but with claims he is being victimized, that the media has conspired against him as have all the Federal justice officials involved. The man is not paranoid, not one bit, he is too full of himself to ever be paranoid, he is just a blatant, consistent liar and a foul mouthed despot in waiting.