Traditional Culture Encyclopedia - Photography major - What does it mean for the police station to collect ten-finger fingerprints and palm prints and take pictures?
What does it mean for the police station to collect ten-finger fingerprints and palm prints and take pictures?
Legal basis: Regulations on the Management of Fingerprint Information of Public Security Organs
Article 1 These Provisions are formulated in accordance with the Criminal Procedure Law of People's Republic of China (PRC) and the People's Police Law of the People's Republic of China in order to strengthen and standardize the work of fingerprint information and give full play to the role of fingerprint information in investigating and solving crimes, cracking down on crimes and managing public security.
Article 2 The fingerprint information mentioned in these Provisions includes: fingerprints of ten fingers (including knuckles and palm prints) and information of relevant personnel; Information of fingerprints, knuckles, palmprints and related cases (events) extracted from the scene.
How criminal investigators collect fingerprints:
Laws of physics:
If fingerprints are left on the surface of non-absorbent objects such as metal, plastic, glass and ceramic tiles. Fingerprints can usually be revealed by physical methods.
1, powder method-choose powder with large color contrast, sprinkle it on the surface of the article, and extract a complete fingerprint.
2, magnetic powder method-use fine iron powder particles, use a magnet as a brush, brush back and forth to show fingerprints.
3. Laser method-The sweat and fatty acid left in the fingerprint will emit color fluorescence after laser irradiation, and a clear fingerprint photo can be taken with a special fingerprint camera.
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