How does the branch of criminal science and technology play its role?

Criminal science and technology is developed on the basis of the development of general science and technology, involving a wide range of technical categories and applications, and plays an important role in the process of collecting evidence, investigating and solving cases, cracking down on crimes, arresting criminals and safeguarding citizens' legitimate interests. Second, the role of criminal science and technology in criminal investigation. In the process of case detection, criminal science and technology can point out the direction for investigators, delimit the scope of investigation, accurately identify the facts of the case and identify the crime. The application of criminal science and technology includes all the contents and methods of natural science and technical science, and the important way to solve a case is the need of investigation work. Criminal science and technology play an important role in the stages of filing, investigation and solving cases. Role in the filing stage 1. Distinguish between cases and events. Objective facts can be divided into cases and events, which plays an important role in judging the nature of events on the spot. For example, in a suspected homicide case, the deceased died of suffocation, but there were no strangulation marks on his neck, and there were traces of forcibly stopping his breathing. After forensic identification, the death of the deceased was a natural death and did not belong to a criminal case. 2. Provide a basis for case characterization. Only when we have a correct understanding of the nature of the case can we decide whether to file a case and carry out investigation activities. Only through the examination and appraisal of criminal science and technology can we determine or clarify whether many events of unknown nature are criminal cases. The motive and purpose of the actor are directly related to the traces left by the crime scene, which is the inevitable result of the actor's activities.