These are files and links that are often referenced in conversation about D.B. Cooper. I’ve put these here to have one spot to go to quickly to get information. These files come from the FBI, Geoffrey Gray, Sluggo and possibly others.
DB Cooper sketches: https://citizensleuths.com/cooperimages-sp-260985789.html
Below is a link to Sluggo’s site. He did a lot of early research in the case and I find his information very useful.
Citizen Sleuths (a great site on DB Cooper research): https://citizensleuths.com/
Researcher Bruce Smith’s Mountain News DB Cooper Site: https://themountainnewswa.net/category/db-cooper/
Researcher Martin Andrade’s Site (the guy who introduced me to Max Gunther’s book): https://martinandrade.wordpress.com/category/crime/d-b-cooper/