investigation method

Generally speaking, the content of criminal investigation method consists of three parts. 1. Reconnaissance technology This paper mainly studies the principles and methods of how to find, fix, collect and test traces and material evidence. Including: the same identification method, judicial photography method, trace inspection method, bullet inspection method, criminal registration method, appearance identification method and so on. These reconnaissance technologies are usually based on the comprehensive utilization of scientific and technological principles and achievements related to physics, chemistry, biology and medicine. 2. reconnaissance measures. This paper mainly studies the effective methods and strategies to implement various reconnaissance measures. Including: on-site inspection, investigation and experiment, investigation and interview, criminal investigation, interrogation and confrontation, evidence identification, expert selection and so on. These reconnaissance measures are carried out within the scope stipulated by law and reconnaissance system. 3. Detection method. This paper mainly studies how to comprehensively use various reconnaissance techniques and means according to the characteristics and requirements of different criminal cases, organize manpower and material resources, find out the case, collect criminal evidence, and finally achieve the goal of arresting criminals. Because criminal cases are different, the detection methods are different, such as murder, arson, theft, rape, hooliganism, corruption, fraud, smuggling and so on.