An informant (also called an informer) is a person who provides privileged information about a person or organization to an agency. The term is usually used within the law enforcement world, where they are officially known as confidential or criminal informants (CI), and can often refer pejoratively to the supply of information without the consent of the other parties with the intent of malicious, personal or financial gain. However, the term is used in politics, industry and academia.
Informants are commonly found in the world of organized crime. By its very nature, organized crime involves many people who are aware of each other's guilt, in a variety of illegal activities. Quite frequently, confidential informants (or criminal informants) will provide information in order to obtain lenient treatment for themselves and provide information, over an extended period of time, in return for money or for police to overlook their own criminal activities. Quite often, someone will become an informant following their arrest.
Informants are also extremely common in every-day police work, including homicide and narcotics investigations. Any citizen who aids an investigation by offering helpful information to the police is by definition an informant.
The CIA has been criticized for leniency towards drug lords and murderers acting as paid informants, informants being allowed to engage in some crimes so that the potential informant can blend into the criminal environment without suspicion, and wasting billions of dollars on dishonest sources of information.
Informants are often regarded as traitors by their former criminal associates. Whatever the nature of a group, it is likely to feel strong hostility toward any known informers, regard them as threats and inflict punishments ranging from social ostracism through physical abuse and/or death. Informers are therefore generally protected, either by being segregated while in prison or, if they are not incarcerated, relocated under a new identity.
Informants, and especially criminal informants, can be motivated by many reasons. Many informants are not themselves aware of all of their reasons for providing information, but nonetheless do so. Many informants provide information while under stress, duress, emotion and other life factors that can impact the accuracy or veracity of information provided.
Law enforcement officers, prosecutors, defense lawyers, judges and others should be aware of possible motivations so that they can properly approach, assess and verify informants' information.
Generally, informants' motivations can be broken down into self-interest, self-preservation and conscience.
A list of possible motivations includes:
- Financial reward
- Pre-trial release from custody
- Withdrawal or dismissal of criminal charges
- Reduction of sentence
- Choice of location to serve sentence
- Elimination of rivals or unwanted criminal associates.
- Elimination of competitors engaged in criminal activities.
- Diversion of suspicion from their own criminal activities.
- Fear of harm from others.
- Threat of arrest or charges.
- Threat of incarceration.
- Desire for witness protection program.
- Desire to go straight
- Guilty conscience
- Genuine desire to assist law enforcement and society.
Corporations and the detective agencies that sometimes represent them have historically hired labor spies to monitor or control labor organizations and their activities. Such individuals may be professionals or recruits from the workforce. They may be willing accomplices, or may be tricked into informing on their co-workers' unionization efforts.
Paid informants have often been used by authorities within politically and socially oriented movements to weaken, destabilize and ultimately break them.
Informers alert authorities regarding government officials that are corrupt. Officials may be taking bribes, or participants in a money loop also called a kickback. Informers in some countries receive a percentage of all monies recovered by their government.
Lactantius described an example from ancient Rome involved the prosecution of a woman suspected to have advised a woman not to marry Maximinus II: "Neither indeed was there any accuser, until a certain Jew, one charged with other offences, was induced, through hope of pardon, to give false evidence against the innocent. The equitable and vigilant magistrate conducted him out of the city under a guard, lest the populace should have stoned him... The Jew was ordered to the torture till he should speak as he had been instructed... The innocent were condemned to die.... Nor was the promise of pardon made good to the feigned adulterer, for he was fixed to a gibbet, and then he disclosed the whole secret contrivance; and with his last breath he protested to all the beholders that the women died innocent."
Criminal informant schemes have often been used as cover for politically motivated intelligence offensives.
Jailhouse informants, who report hearsay (admissions against penal interest) which they claim to have heard while the accused is in pretrial detention, usually in exchange for sentence reductions or other inducements, have been the focus of particular controversy. Some examples of their use are in connection with Stanley Williams, Cameron Todd Willingham, Gerald Stano, Thomas Silverstein, Marshall "Eddie" Conway, and a suspect in the disappearance of Etan Patz.
Terminology and slang
Slang terms for informants include:
- cheese eater
- canary — derives from the fact that canaries sing. "Singing" is underworld or street slang for providing information or talking to the police.
- dog — Australian. May also refer to police who specialize in surveillance, or police generally.
- fink — this may refer to the Pinkertons who were used as plain-clothes detectives and strike-breakers.
- grass or supergrass, — rhyming slang for grasshopper, meaning copper or shopper and having additional associations with the popular song, "Whispering Grass", and the phrase snake in the grass.
- narc — a member of a specialist narcotics police force.
- nark — this may have come from the Romany term nak for nose or the French term narquois meaning cunning, deceitful and/or criminal.
- pentito — Italian term, meaning "one who repents." Usually used in reference to Mafia informants, but it has also been used to refer to informants for Italian paramilitary or terrorist organizations, such as the Red Brigades.
- pursuivant (archaic),
- rat — informing is commonly referred to as "ratting."
- stool pigeon or stoolie 
- tell tale or tell-tale
The phrase "drop a dime" refers to an informant using a payphone to call the authorities to report information.
The term "stool pigeon" originates from the long-ago practice of tying a passenger pigeon to a stool. The bird would flap its wings in a futile attempt to escape. The sound of the wings flapping would attract other pigeons to the stool where they could be easily killed or captured.
List of famous individuals
- Whitey Bulger, Boston organized crime boss and subject of Black Mass
- Nicholas Calabrese, the first made man to testify against the Chicago Outfit
- James Carey, Irish terrorist
- W. Mark Felt, a.k.a. "Deep Throat", former Deputy Director of the FBI
- Sammy Gravano, former underboss of the Gambino crime family
- Henry Hill, Lucchese crime family associate
- Frank Lucas, New York drug dealer turned informant
- Abe Reles, Murder, Inc. hit man
- Freddie Scappaticci, member of the Provisional IRA
- Joseph Valachi, soldier in the Genovese crime family
- Salvatore Vitale, former underboss of the Bonanno crime family
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- Agent provocateur
- Aguilar–Spinelli test
- Covert interrogation
- Hollywood blacklist
- Plea bargain
- Turn state's evidence
- United States Marshals Service
- Witness Protection Program
- "informer". Merriam-Webster Dictionary. Merriam-Webster. Retrieved 6 June 2016.
2: one that informs against another; specifically : one who makes a practice especially for a financial reward of informing against others for violations of penal laws
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- "grass". Oxford English Dictionary.
A spy or informer, esp. for the police
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- "nose". Oxford English Dictionary.
A spy or informer, esp. for the police
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- "snout". Oxford English Dictionary.
A police informer
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- Prison ministry: hope behind the wall by Dennis W. Pierce – 2006
- Coleman 1996, p. 24.