Stern Crime Nr. 9
https://www.true-crime-story.de/d-b-cooper-flugzeugentfuehrung-1971/
https://www.stern.de/panorama/stern-crime/d-b--cooper--der-vielleicht-raetselhafteste-kriminalfall-der-us-geschichte-6949504.html
https://de.wikipedia.org/wiki/D._B._Cooper
https://www.fbi.gov/contact-us/field-offices/seattle/news/press-releases/update-on-investigation-of-1971-hijacking-by-d.b.-cooper
https://ucr.fbi.gov/news/stories/2009/march/in-search-of-d.b.-cooper/
https://www.fbi.gov/history/famous-cases/db-cooper-hijacking
https://en.wikipedia.org/wiki/Richard_McCoy_Jr
https://www.oregonlive.com/history/2018/01/as_a_new_clue_upends_db_cooper.html