tong fan, the leader of the special investigation team of jiang city criminal police team, hopes to open up a new realm for criminal investigation and criminal psychology through advanced courses in crime scene investigation and criminal psychology, and find a new path to strengthening the police with science and technology. at the same time, it is also recommended to introduce a psychological counseling mechanism to psychologically work for police officers who have been in a high-pressure working environment for a long time and face the extremely vicious criminals. bbb。 at this time, a series of vicious cases occurred in jiang city. the special investigation team entered the investigation in full, but found a major conspiracy that endangers social security hidden behind the murder case. during the investigation of in-depth cases, tong fan endured the pressure that ordinary people could not bear, and led the members of the special investigation team to keep pace with the times through scientific and technological means such as the perfect restoration of the crime psychology and the crime scene, cleared up the fog, and went through hardships and obstacles, and finally caught all the criminals in one go. the special investigation team ultimately protected the safety of the people and the country's property.