A man going by the name Dan Cooper in his mid 40's and wearing a business suit and a black rain type overcoat, brown shoes, a white shirt and black tie on Wednesday November 24, 1971 bought a one way ticket for flight number three hundred five from Portland, Oregon to seatle, Washington. He carried a dark briefcase and a paper bag whose measurements were as follows four inch by twelve inch by fourteen inch .
Cooper was seated in 18C and ordered a bourbon and a soda. Little after 3 pm when the plane took off Cooper handed a note to the flight attendant. He ordered the stewardess to better look at the note before doing anything else. Then he asked her to sit next to him and then showed her the bomb which was in his briefcase. The briefcase had red coloured sticks surrounded by an array of wires. After that cooper made her write a note and ordered her to take it and to the captain. The note read as follows “ I want dollar two hundred thousand by 6 pm in cash put in a bag along with two back and two front parachutes ".
The flight landed in Seatle and Cooper exchanged the thirty six passengers on the plane for the money and the parachutes. Cooper kept some members on the plane and ordered the plane to be taken off to Mexico City ordering the plane to remain below ten thousand feet. During the flight Cooper started preparing for his escape first he put on a pair of dark wrap around sunglasses with dark rims and when the plane was somewhere between Seatle and Reno , Cooper jumped out of the rear doors of the Boeing 727 with two of the parachutes and the money and that was the last time he was seen. One thing worth noting was that Cooper took off his black T.C Penney clip on tie before jumping.
After this a search operation called “ NORJAK” standing for Northwest Hijacking and that lasted for decades was started. The plane was intensely searched for evidence. The FBI had released the serial numbers of the bills that were given to Cooper . Remarkably in the year 1980, nine years after Cooper's mysterious missing a rotten package full of dollar 20 bills of the same serial number was discovered by a young boy on beach at Tina bar. But even after that there was no trace of Cooper.