Don't belong. The object of inspection is the scene or environment, and the object of appraisal is physical evidence. Generally speaking, an inquest is not a direct statement, but a standard statement is an inquest. As far as China's physique is concerned, inquest and appraisal belongs to the field of criminal technology. In fact, this understanding is vague and superficial, and it is an immature way of obtaining evidence in court. The practice of international standards is that the inquest belongs to the investigation organ, and the subject should be investigators, investigators or prosecutors, while the appraisal belongs to the laboratory. The inquest may be put forward by investigators, or laboratory appraisers may be hired to conduct on-site inquests and special professional inquests. At this time, the appraiser was hired as an expert to assist the investigators to complete the inspection, and the main body was still the investigators. In a sense, the inspection and appraisal work itself should belong to two departments. In China, these two tasks are generally placed in the same department, commonly known as the criminal technology center.

Technical investigation belongs to the category of secret investigation, which is a special work to obtain investigation clues and expand investigation channels by various secret means. The data obtained by general technical investigation should not be presented as evidence, but after the criminal procedure law of NPC and CPPCC was revised in March 20 12, the data obtained in this way was specifically explained in court as evidence, and in some cases, it can also be used as evidence.