What knowledge must a detective master?

Detective's professional knowledge includes many aspects: criminal psychology, law, information science, detective science, physical evidence science, physical evidence extraction, tracking and monitoring, communication network, capture and fighting, crisis self-help and other professional technologies; In addition, we should know how to disguise, disguise, find 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 eavesdropping technology and tracker, how to track and counter-track, and how to counter intelligence, detective and eavesdropping.

Specifically, it is not enough to understand the above aspects, and there are the following contents:

1. Radio transceiver technology and intelligence gathering technology

2. Photography, darkroom, microfabrication, topography, map knowledge and drawing technology

3. makeup artist, camouflage, professional cover technology

4. Tracking, surveillance, escape, prison break, anti-reconnaissance and anti-intelligence technology

5. Organization and leadership technology of information network

6. Customs clearance and crisis self-help technology, capture fighting technology.

7. Skydiving and car driving skills

8. Osmotic reflux technology

Detective (full name: detective, English: detective) is a profession responsible for investigating cases. Investigator refers to the investigator in charge of the investigation, which can be a criminal policeman or a private detective. The former is the police, responsible for investigating and detecting criminal cases. The latter is to investigate extramarital affairs, find people and find secrets for employers through private entrustment, including private entrustment to detect criminal cases.