A middle-aged man bought a one-way plane ticket to Seattle with a cash transaction and disappeared when he got off the plane. He literally disappeared and has not been traced since 1971.

On 24 November 1971, dressed in a suit and carrying a black bag, he went to Portland International Airport in the USA and bought a one-way ticket to Seattle. The man who bought the ticket with cash said his name was 'Dan Cooper'. He took his seat in seat 18C on a Boeing 727 aircraft.

The plane took off on time. Cooper handed a note to one of the stewardesses. The stewardess was not interested because she thought Cooper was writing a note to hit on her. When Cooper saw this, he said to the stewardess again, "Madam, you'd better look at the note; I have a bomb with me."

Cooper, noticing the slight alarm in the stewardess, showed the bomb in his bag to the stewardess and asked her to pass the note to the pilot. The stewardess immediately took the note to the pilot.

The note Cooper wrote said: "I want $200,000, all in $20 bills, and don't forget four parachutes, two front and two rear. If you try to play games, I'll do what I have to do. Land in Seattle and unload the passengers. Get the plane back in the air, we're heading for Mexico City. I'll collect the money in Seattle."

After the pilot read the note, he said he would do what was necessary. The plane landed in Seattle and the passengers were evacuated. Cooper received the ransom money and the plane took off again for Mexico City.

Shortly after the aircraft took off for Mexico City, according to the testimony of the stewardesses, D.B. Cooper put on his black flight goggles. He began to move towards the rear of the aircraft. The stewardesses testified that at that moment they felt a draft. At the moment they felt that airflow, when they looked at the back of the aircraft; They saw that the back door was open and Cooper jumped out of the aircraft, leaving only a tie behind.

No trace of D.B. Cooper, who jumped out of the plane somewhere between Seattle and Reno, was found again. The FBI ran a DNA scan on his tie, which was the only thing he left behind on the plane. But no results were obtained.

The serial numbers of the ransom money given to Cooper echoed all over the USA. Nine years after the incident, the coins found by a small child on the banks of the Columbia River matched the serial numbers of the ransom money given to D.B. Cooper.

What was interesting was that a year after the incident, that is, from 1972 onwards, the FBI, The New York Times and The Washington Post received letters claiming to be D.B. Cooper. Within the scope of these allegations, 800 people were listed as suspects. After the investigations, 24 people remain. Although never confirmed, let's talk about the two most likely suspects.

THE FBI'S FAVOURITE SUSPECT: RICHARD FLOYD MCCOY

Richard Floyd McCoy, a hijacker like Cooper, was arrested five months after Cooper on charges of hijacking. His modus operandi was very similar to Cooper's.

McCoy handed the stewardess a note mentioning a bomb. He demanded a ransom and four parachutes from the pilot. After receiving the ransom, he jumped out the back door of the plane and escaped. Looking at these similarities, the FBI thought McCoy and Cooper were the same person. Although he was sentenced to 45 years in prison for the hijacking, he never admitted that he was D.B. Cooper.

CONFESSION JUST BEFORE DYING: DUANA WEBER

Just before he died, he told his wife Jo Weber, "I have a secret to confess. I'm actually Dan Cooper." He thought his wife's confession was true. because he had good reasons. These reasons were as follows;

Duana Weber hurt her knee jumping out of an aeroplane. Sometimes in her sleep she would say sentences like 'I may have left fingerprints on the plane'. He also said that his wife still kept a Seattle plane ticket dated 24 November 1971 at home, but he could never understand why she had bought this ticket.

The FBI confirmed that McCoy's story matched D.B. Cooper's, and that his physical appearance was identical to the sketch. But they still haven't been able to confirm it. The reason for this is the "I am D.B. Cooper" confession in the thousands.

According to the FBI's own statement, D.B. Cooper is among their most difficult cases. In 2007, an FBI agent named Larry Carr took over the Cooper case. Carr made the following statement:

"Until today, we thought that D.B. Cooper was alive after jumping out of the plane, that he might have escaped somewhere. It was already dark and raining when Cooper jumped out of the aeroplane. No experienced parachutist would jump out of an aeroplane travelling at that speed with the wind against him in the rain. In addition, Cooper's landing site was completely wooded and, as far as we know, he did not have night vision goggles. In my opinion, Cooper died immediately after jumping and his body was never found because it was in the woods."

The FBI still hasn't solved the D.B. Cooper case, but Boeing added a pin to the rear door of their 727 aircraft after D.B. Cooper and Richard Floyd McCoy's escape from the plane. Thanks to this pin, the door would not open while the aircraft was in motion. This pin was even named 'Cooper'.