The biggest difference from the investigation of other crimes is the detection mechanism of this murder case. After starting this mechanism, regardless of the cost of handling cases and the division of labor, local public security organs should fully cooperate with one goal, that is, to lock and capture criminal suspects as quickly as possible.
Investigation path:
shelving
1, generally extracted from the center of the scene as clues, such as DNA, fingerprints, blood, footprints, etc.
2. Then spread to the vicinity of the central site, and began to look for surveillance, witnesses and suspicious vehicle information.
3, mobilize the city, the province's main intersections, traffic port monitoring, to determine whether the suspect fled and escape route.
4, request the public security organs in other regions to cooperate and provide all kinds of information.
vertical
1. Investigate the social network of the deceased. What was the victim doing these days before he died? Did he have any unusual behavior?
2. Check whether the deceased has enemies, debts, lovers, competitors and other contradictions.
3, big visit, big investigation, visit relatives of the deceased, check all the people who had contact with the deceased recently.
4. Ask the criminal psychologist to analyze the suspect's motivation, conduct psychological high-pressure inquiry on key suspicious objects, and conduct psychological experiments such as lie detection on the suspect when necessary.
As far as I know, their murder investigation method is probably like this. The general investigation mode is generally like this, but the time, financial resources and manpower are not as fully guaranteed as the murder case.