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Informant
01
осведомитель
someone who knows about an event and is ready to share this information
02
информатор
one that secretly provides information about something or someone for the police or investigators
Пример
The detective met with the informant in a secure location.
The informant turned the drug dealer in to the narcotics unit.
An informant provided crucial details that led to the arrest of the suspects.
The informant agreed to inform against the criminal organization in exchange for protection.
The informant was willing to finger the drug lord to the authorities in exchange for immunity.