Ralph Himmelsbach spent the last 9 years of his FBI career on the 1971 D.B. Cooper hijacking, and then put it squarely behind him — at least, until someone else brought it
Pirate of the Sky: An Unsolved Thanksgiving Mystery - Criminal Element
50 years ago this week: D.B. Cooper jumped in history - and mystery | KVAL
Skydiving Highjacker Who Scored $200,000 Could Be Living in San Diego; Is it Okay to Idolize Criminals? | The Inertia
Crime historian conducts dig for evidence in DB Cooper case
We Might Have Been Looking For D.B. Cooper In Wrong Place For All These Years | Northwest News Network
50 Years On, the Unsolved D. B. Cooper Skyjacking Is the Stuff of Legends | Portland Monthly
DB Cooper gives authorities one final slip as FBI closes case after 45 years | FBI | The Guardian
50 Years Today: The Infamous Hijacking of D.B. Cooper – The Viking Times
The mystery of DB Cooper, the hijacker who got $200,000 then jumped from a jet (1971) - Click Americana
1400: D.B. Cooper - explain xkcd
Knowing Nevada: Revisiting the Mystery of D.B. Cooper | KRNV
Is D.B. Cooper Still on the Run? | Seattle Met
50 years ago: DB Cooper left Portland, jumped into history | KOIN.com
DB Cooper's Legendary Plane Jump Recreated | Expedition Unknown - YouTube
D.B. Cooper Hijacking — FBI
D.B. Cooper Hijacking — FBI
D. B. Cooper - Wikipedia
Who is D. B. Cooper? | Sky HISTORY TV Channel
D B Cooper's Jump
D.B. Cooper | Hijacking, Investigation, Parachute, Money Serial Numbers, Suspects, & Facts | Britannica
Sleuthing the Enduring Mystery of D.B. Cooper - Tahoe Quarterly
D.B. Cooper - Crime Museum
