Crime scene investigation is crime scene investigation. In the struggle against criminal crimes, in order to find out the case, judge the nature of the case, and provide clues and evidence for solving the case, criminal investigators, in accordance with the provisions of the Criminal Procedure Law, use scientific and technical means and investigation and interview methods to conduct on-the-spot investigation and investigation and interview on the physical evidence related to the crime, such as places, objects, people, corpses and so on.
On-the-spot investigation, including on-the-spot investigation, on-the-spot visit and on-the-spot judgment, is an important part of the whole criminal case investigation activity and an important investigation measure of the criminal procedure law.