2011One day in mid-May, the office phone of Li Ang, the squadron leader of the fifth responsibility squadron of Chuanying Branch of Jilin Public Security Bureau, suddenly rang. It was an anonymous call from a woman. "Male guest No.2 is a murderer who fled after killing in Chuanying, Jilin City 13 years ago." The woman said on the phone that in the blind date program of "Happiness Alliance" broadcast by Heilongjiang Satellite TV 201014, male guest No.2 was suspected to be a murderer and fugitive, and she assumed the alias of Liu Hao on TV, claiming to live in Shenyang. After receiving the report, the police attached great importance to it and immediately seized the TV programs at that time and the case files of that year. The police found that the second male guest in the program could sing and dance, and finally succeeded in holding hands with the second female guest. After comparing the appearance, age and work characteristics of No.2 male guest Liu Hao, the man was identified as WU GANG, and then the police filed a case for investigation. With the cooperation of Heilongjiang Satellite TV, the police obtained Liu Hao's telephone number and QQ number. In Liu Hao's QQ space, the police found a large number of photos of him, and many words such as "atonement" were also found in the QQ signature, which further confirmed his criminal suspicion.