Investigation represents an individual's proficiency at deductive reasoning. In most cases, this skill is applied to the arena of criminal investigation. Classes of people known to possess this talent include detectives, secret agents, police inspectors, private investigators, and pulp era gumshoe detectives.
The art of investigation evolved greatly over the years, and new techniques and processes were being developed all of the time. Investigation is no longer confined to the art of simple sleuthing. It now incorporates scientific processes such as cryptography, steganography, computer networking, analysis etc. It also involves more intelligence-related applications including interrogation, disinformation, surveillance, concealment, infiltration and communications.
The computer age practically changed the entire dynamic of investigation techniques, and many investigators, both in the government and the private sector, perform their best work from behind the scenes.
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