Headline writers are the worst, they so often misrepresent the article. I don't mean you OP, but in this case a headline writer at CNN (the actual author of the article most likely did not write the headline). From the article:

"...the ultimate conclusion that GM Niemann had not made himself guilty of over-the-board cheating" and "there was no “statistical evidence to support GM Niemann cheating in over the-board games”".

The headline implies they found he didn't cheat, whereas it should probably say they didn't find (enough) evidence he cheated. It's a subtle difference, but with big implications.

Niemann is a scumbag. Sure he's innocent until proven guilty, but he's already been proven to be a cheater and a liar.