In the United States, informants are a mysterious group with a large body and a wide range of businesses. They can disturb the Congress, kidnap the governor, lure snakes out of their holes, and destroy drug dens. Every adventure is a deal with a clearly marked price. 　　The temptation of huge profits 　　Hamad was once a prisoner who was imprisoned for assisting in drug production. After his release, he was developed into an informant for the FBI. He was paid $380,000 for leading a counterterrorism operation in Southern California. 　　There are many informants like Hamad among the people. The informant Naseem Khan was paid $230,000 after the anti-terrorist attack in…