He did the same thing when he was on the warpath against me.  Brought up unsubstantiated (and false) allegations, then tried to change the subject when his own motivation was called into question.  The good thing is that his M.O. is well known by almost everyone at this point, and he won't be back on default trust until he learns to calm himself.  He's a lot like an ambitious, amateur cop who wants to make it to the top by arresting everyone in site.  He doesn't have any sympathy for anyone other than himself.  So while it's true that he catches a scammer in action from time to time, he also steamrollls a huge number of innocent people with no remorse.  If he ever realizes this, he could do the forum a lot of good.  Until he realizes this, he causes more harm than good.