There were red flags that he could be overzealous, on two occasions where he shot someone in trying to break up an altercation.
He wanted to be judge and jury, and didn't care about working within the system. We don't need cops like that, and the one good thing he did was resign and hopefully get out of a position of trust where he could ruin peoples lives.
I think I'll dig out his book, and the Vanity Fair article, and start a thread on his great work on the case.
I do think somewhere in his case files, he had the right tip---that was one of the hundreds that were discarded.