Answer: D) Latent fingerprint technology relies on the chemical reaction between the secretions from our bodies and the chemicals that crime scene investigators use to bring about these chemicals.
Explanation:
The latent fingerprint is a pattern of friction ridge skin over the surface of the object or any other surface. This leads to the deposition of the oils and other materials from the hands to the surface. The friction ridge skin is not usually visible with the naked eye instead requires special techniques to observe the prints on the surface. The special techniques involves the dusting of fingerprint powder, use of alternative, ultraviolet light source and powder with tape lifting.
The typical secretions like salts, fats and oil which are the main components of the sweat reacts with the chemicals used in the techniques to observe the fingerprints on the surface. The techniques help in locating prints and collecting them from the scene of crime that can be further used for criminal investigation.
