The victim in the criminal case has been proved by ct. Is it necessary to dissect the corpse? Why?

Anyone who meets one of the following conditions shall undergo a forensic autopsy:

1. involving a criminal case, the cause of death can only be determined after an autopsy, and the cause and nature need to be ascertained;

2. Sudden or sudden death, suspected homicide or suicide;

3 because of industrial and agricultural poisoning or serious infectious disease death involving legal issues.