On November 24, 1971, a man boarded a plane in Portland, hijacked it, walked away with $200,000, and disappeared. That much is certain.
Who he actually was is a different story entirely.
For more than fifty years, FBI agents, journalists, authors, and no shortage of amateur investigators have chased the identity behind the name "Dan Cooper." The Bureau alone formally examined more than 800 suspects within the first five years of the case, and well over a thousand by the time it was finished. Most were eliminated quickly. A handful stayed under serious scrutiny for years. A few became so tightly woven into the mystery that arguments about them are still happening in true-crime forums today.
None has ever been conclusively proven to be Cooper. These are the names that keep coming back.
Richard McCoy Jr.
If there's one suspect who reliably tops every list, it's Richard McCoy Jr. - and at first glance, the resemblance to Cooper's crime is genuinely uncanny. Less than five months after the Flight 305 hijacking, McCoy pulled off an almost identical stunt: he hijacked a Boeing 727, demanded a large cash ransom and parachutes, and jumped from the rear stairs mid-flight, walking away with $500,000.
The similarities were enough to convince a lot of people the case had finally been cracked. But McCoy made one critical mistake Cooper never did - he left fingerprints all over the aircraft, and was arrested within days. He was sentenced to 45 years for air piracy, escaped prison less than three years later by hijacking a garbage truck through the gates, and was killed in a shootout with police in Virginia Beach a few months after that.
Despite the eerily similar method, the FBI has never actually considered McCoy a credible suspect in the original Cooper case. The physical mismatches were significant - McCoy was 29, more than a decade younger than the mid-40s hijacker witnesses described, with noticeably protruding ears and a broader nose that flight attendants specifically pointed out didn't match. Three separate stewardesses who'd interacted closely with Cooper were shown McCoy's photo and all three said it wasn't him. There's also a solid alibi: credible evidence places McCoy in Las Vegas the day of the Portland hijacking, and at home in Utah for Thanksgiving dinner with his family the very next day.
The case isn't entirely closed, though. In 2023, McCoy's adult children came forward with a modified parachute, harness, and skydiving logbook they say had been hidden in a storage shed on the family's North Carolina property for decades - items they claim place their father at the scene of the original hijacking. They'd apparently waited until their mother passed away before handing anything over. The FBI, despite having officially closed the Cooper case in 2016, collected the items as evidence. As of now, nothing conclusive has come from it, but it's the kind of development that keeps this suspect firmly in the conversation.
Kenneth Christiansen
Kenneth Christiansen might be the most genuinely intriguing name on this list, mostly because of how close he actually was to the case. Unlike most suspects, he had a direct, documented connection to the hijacked airline - he'd worked for Northwest Orient as a mechanic, flight attendant, and purser. He'd also trained as a paratrooper in the U.S. Army during World War II, made jumps while stationed in occupied Japan, smoked, and by his family's account, had a fondness for bourbon - the exact drink Cooper ordered on the flight.
Suspicion around him only deepened after his death from cancer in 1994. According to his brother Lyle, Kenneth called him over on his deathbed and said there was something he should know but couldn't tell him - and then never explained further. Lyle also later pointed out that Kenneth had bought a house in cash the year after the hijacking, despite working on a modest flight attendant's salary. Flight attendant Florence Schaffner, shown photographs of Christiansen years later, said his face matched her memory of the hijacker more closely than any other suspect she'd been shown - though she stopped short of a positive identification.
The problem is the physical description. Christiansen was shorter and noticeably thinner than eyewitnesses described Cooper - around 5'8" and 150 pounds, well under the roughly six-foot frame most witnesses recalled. The FBI has stated plainly that it doesn't consider him a prime suspect, citing that mismatch along with a complete absence of any direct evidence tying him to the crime. Compelling story. Thin case.
Duane Weber
Few suspects generated as much public fascination as Duane Weber, and the story starts, fittingly, with a deathbed confession. According to his widow, Weber told her shortly before he died that he was Dan Cooper. As she looked into her late husband's past afterward, she reportedly turned up a number of details that seemed to line up with the hijacking, some of them oddly specific.
For a while, that was enough to make Weber a serious contender. But once the FBI actually examined the claim, it didn't hold together. Fingerprint comparisons didn't match. DNA testing against genetic material recovered from Cooper's tie proved inconclusive at best. And many of the supposedly specific connections Weber's widow had uncovered couldn't be independently verified. It remains a genuinely eerie footnote to the case - just not one investigators found any hard evidence to support.
Robert Rackstraw
No suspect has generated more controversy than Robert Rackstraw. A former Army pilot with a genuinely complicated personal history, he checked a lot of boxes on paper: military training, real aviation knowledge, parachuting experience, and by most accounts, a longstanding reputation for deception.
Independent researchers and at least one television documentary team became convinced he was their man - convinced enough that, in a genuinely bizarre twist, producers working on a History Channel documentary reportedly offered Rackstraw one million dollars and a movie deal if he'd confess on camera. He turned it down flat, and the offer itself became a minor scandal once it came to light, with critics arguing it undercut the credibility of the whole theory. The FBI investigated Rackstraw extensively over the years and ultimately concluded the evidence against him was insufficient. He denied being Cooper for the rest of his life, though he was also known for dropping cryptic, non-committal remarks about the case rather than issuing a flat denial. He died in 2019, and the argument about him hasn't really stopped since.
Lynn Doyle "L.D." Cooper
Sometimes the most compelling leads come from family, not forensics. Lynn Doyle Cooper entered the case in 2011, when his niece Marla Cooper came forward with childhood memories that had stuck with her for forty years. As an eight-year-old, she recalled her uncle and another relative planning something they described as "very mischievous" at her grandmother's house in Oregon the night before the hijacking - reportedly involving expensive walkie-talkies. The next day, Flight 305 was hijacked. The two men had told the family they were out turkey hunting for Thanksgiving. When L.D. came home, his shirt was covered in blood, which he explained away as a car accident.
There's a genuinely striking detail buried in this theory, too: Marla and other family members later said L.D. had been fixated on a Canadian comic book character named Dan Cooper - a dashing test pilot and adventurer from a long-running French-language comic series - and reportedly kept one of the comic books pinned to his wall. If true, it would explain something the case has never otherwise accounted for: where the hijacker's chosen alias actually came from.
It's a compelling story, but the FBI investigated it and ultimately ruled Lynn Cooper out, in part based on DNA testing that failed to connect him to genetic material recovered from Cooper's tie. He died in 1999, and by most accounts never spoke about it publicly. Notably, he also wasn't a skydiver or a paratrooper - a real gap given what the actual jump required.
A Newer Name in the Mix: Sheridan Peterson
One suspect who flew under the radar for decades is Sheridan Peterson, a former Boeing employee who actually came under FBI suspicion within about a week of the hijacking but wasn't formally interviewed until decades later. What makes him interesting is his job: he'd worked in the very Boeing department responsible for writing the 727's flight manual - meaning he would have known, in intimate detail, exactly how the aircraft's rear airstair worked and how to use it safely mid-flight. He was also an accomplished skydiver who'd worked as a wildland smokejumper in Montana. Researchers have continued actively pushing this theory as recently as the 2020s, and it remains one of the more actively debated leads in the case today.
The Problem With Every Suspect
What makes this case so genuinely frustrating is that almost every serious suspect looks convincing on first read. Each one tends to bring some combination of aviation knowledge, military background, a criminal record, or a physical resemblance to the sketch. And then, without fail, the same pattern repeats: witness descriptions don't quite line up, timelines conflict, DNA fails to confirm anything, fingerprints don't match.
One after another, promising leads collapse under the weight of their own gaps. The result is a case where nearly everyone looks possible, and nobody looks certain.
The Suspect Who Was Never Found
There's a less popular but genuinely unsettling possibility worth sitting with. What if Cooper's name never actually surfaced in any FBI file at all? What if he was simply an ordinary man with no criminal record, no military file flagged for scrutiny, nothing that would have put him on anyone's radar? What if he died in the wilderness within hours of the jump and was simply never found?
If that's what happened, it means investigators may have spent five decades searching in entirely the wrong direction - sifting through suspects who were never going to be him in the first place.
Why the FBI Never Made an Arrest
Across the life of the investigation, the FBI formally examined more than a thousand serious suspects. Not one was ever arrested for the crime. The reason comes down to something simple: suspicion isn't proof. The Bureau needed hard evidence, not resemblance, not rumor, not a compelling family story. And despite everything thrown at this case over more than fifty years, that evidence never materialized.
The case stayed open for decades. The debate never really stopped. And then, nearly nine years after the hijacking, a discovery along a riverbank in Washington State would hand investigators the first genuine physical evidence connected to the ransom money since the night Cooper disappeared - a breakthrough that, instead of answering the case's biggest questions, ended up raising even more.
Frequently Asked Questions
Who are the main suspects in the D.B. Cooper case? Leading suspects include Richard McCoy Jr., Kenneth Christiansen, Duane Weber, Robert Rackstraw, and Lynn Doyle "L.D." Cooper, though none has ever been conclusively proven to be the hijacker.
Was Richard McCoy Jr. D.B. Cooper? The FBI never considered him a credible suspect. Despite copying Cooper's method months later, McCoy was younger, physically different, and had an alibi placing him elsewhere on the day of the hijacking.
Did anyone ever confess to being D.B. Cooper? Duane Weber reportedly told his wife on his deathbed that he was Dan Cooper, but fingerprint comparisons didn't match and DNA testing against evidence from Cooper's tie was inconclusive.
Why was Kenneth Christiansen considered a suspect? He worked for Northwest Orient, had military parachute training, and drank bourbon like Cooper did, but his height and build didn't match eyewitness descriptions of the hijacker.
Has DNA evidence identified D.B. Cooper? No. DNA testing against genetic material recovered from Cooper's tie has failed to conclusively match any of the FBI's leading suspects, including Lynn Doyle Cooper and Duane Weber.
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