CSI: Criminal Investigation, The Next Episode

A criminal investigation is a field in which detectives use several techniques to investigate a crime. The majority of cases are solved by the interrogation of suspects and witnesses, which takes time. Besides interrogations, detectives may rely on a network of informants they have cultivated over the years. Informants often have connections with persons a detective would not be able to approach formally.

A detective is an investigator, either a member of a police agency or a private person. Private detectives usually operate commercially and are licensed. They may be known as private investigators. Informally, and primarily in fiction, a detective is any unlicensed person who solves crimes, including historical crimes, or looks into records.

In criminal investigations, once a detective has a suspect or suspects in mind, the next step is to produce evidence that will stand up in a court of law. The best way is to obtain a confession from the suspect, usually in exchange for a plea bargain for a lesser sentence. A detective may lie or otherwise mislead and may psychologically pressure a suspect into confessing, though in the United States suspects may invoke their Miranda rights.

The ruling stated by the Supreme Court set down guidelines for the Miranda rights to be followed: The person in custody must, prior to interrogation, be clearly informed that he has the right to remain silent, and that anything he says will be used

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against him in court; he must be clearly informed that he has the right to consult with an attorney and to have that attorney present during interrogation, and that, if he is indigent, an attorney will be provided at no cost to represent him.

The detective branch in most larger police agencies is organized into several squads or departments, each of which specializes in investigation into a particular type of crime or a particular type of undercover operation, which may include homicide, robbery, stolen vehicles, organized crime, fraud, burglary, narcotics, forgery, criminal intelligence, sex crimes, street crime, computer crime, crimes against children, surveillance and arson.


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