The Finder has been forced to reveal himself due to a suit brought against him. Jack Stuef was the person who found it and Outside Magazine has a good story on the whole discovery. As well, I've included a couple Medium posts from Jack himself; One is a Rememberance of Forrest Fenn, and the other is a statement on the disclosure of his identity.
https://www.outsideonline.com/241942...ure-jack-stuef
https://thefinder.medium.com/a-remem...n-1be2a8646ff2
https://thefinder.medium.com/a-state...y-602d95f04b9f