5. Be good at mental games. The psychological game between D.B. Cooper and his opponent is divided into two stages: when hijacking, the opponent is mainly the crew, passengers and the FBI, and at this time, it is mainly to force the other party to "choose the lesser of the two evils" and make a choice to pay the ransom; After the hijacking, his opponents were the FBI, ZF, media and the American public. The hijacking activity carefully designed by D.B. Cooper is like a live entertainment performance, which has won the support and even admiration of the media and the public. The advantage of this is that the case is not so vicious, and the FBI has no pressure. If a passer-by finds his trail, he will not be reported or will get help ... Even if he is arrested, the media and the public will have a fight. 6. Not greedy. This is very important. At that time, $200,000 can be converted into a down payment in today's Beijing Third Ring Road. Who doesn't want to take more ... but the weight of 200 thousand bills is just the burden that normal people can bear outdoors. Cooper can tolerate excessive temptation. In addition, D.B. Cooper did not repeat crimes in his life (assuming he survived at that time), which also ensured his long-term safety. 7. Don't hurt innocent people. This is very important. If there were casualties at that time, the malignancy of the case would be different. Moreover, for the media and the public, the mainstream values of all people are unlikely to accept a criminal who kills innocent people as an idol, and D.B. Cooper has lost these supporters.