A complete collection of essential detective knowledge

1. Detective professional knowledge includes many aspects: criminal psychology, law, intelligence, detective science, physical evidence, and various majors such as evidence extraction, tracking and surveillance, communication network, capture and combat, crisis self-rescue, etc. technology; in addition, you also need to understand how to disguise, disguise, discover and approach targets; how to collect intelligence from public and semi-public documents; how to interrogate, lure, and buy intelligence; how to use bugs and tracking devices; how to track and Anti-tracking, counter-intelligence, anti-detection, anti-eavesdropping, etc.

2. You must also master radio transceiver technology, intelligence collection technology, photography, darkroom, film microfilm technology, terrain, map knowledge and drawing technology, makeup skills, camouflage skills, professional cover technology, tracking, surveillance, Escape, jailbreak, counter-reconnaissance and counter-intelligence techniques, intelligence network organization and leadership techniques, rescue and crisis self-rescue techniques, capture and combat techniques, skydiving, car driving techniques, infiltration and return techniques, history, geography, customs, Knowledge of etiquette, politics, economics, and cultural landscapes, techniques for forging documents and certificates, techniques for using various reconnaissance equipment, tools, etc., as well as techniques for autopsy, judgment of death, and inference of time of death, etc.

3. Speaking skills. In Western detective work, the most important thing is said to be the art of interpretation. When talking to the other person, you must hear the clues of the matter, otherwise you will lose the qualification to be a detective.