A complete collection of necessary knowledge for detectives

1. Detective's professional knowledge includes many aspects: criminal psychology, law, information science, detective science, material evidence science, material evidence extraction, tracking and monitoring, communication network, capture and fighting, crisis self-help and other professional technologies; In addition, we should know how to make up, disguise, find the target and approach the target; How to collect information in open and semi-open literature; How to ask questions, seduce and buy information; How to use bugs and trackers; How to track and counter-track, as well as counter-intelligence, anti-detection, anti-eavesdropping, etc.

2, but also to master radio transceiver technology, intelligence gathering technology, photography, darkroom, micro-film technology, topography, map knowledge and drawing technology, makeup skills, camouflage, professional cover technology, tracking, surveillance, escape, prison break, anti-reconnaissance and anti-intelligence technology, intelligence network organization and leadership technology, rescue and crisis self-help technology, capture fighting technology, skydiving, car driving technology, diving back. Knowledge of history, geography, customs, etiquette, politics, economy, human landscape and other aspects of a specific country or region, technology of forging documents and certificates, technology of using various reconnaissance equipment and tools, technology of autopsy, judging death and inferring time of death.

3. Speaking skills. It is said that the most important thing in western detective work is reading. When talking to each other, you must listen to the clues of things, otherwise you will lose your qualification as a detective.