CI
noun [ C ] mainly US
秘密线人（confidential informant 的缩写）
abbreviation for confidential informant: a person who secretly gives information to the police about criminal activity
She worked for years as an active CI, and still called occasionally with tips on various cases. 她作为一名活跃的秘密线人工作了多年，现在仍然偶尔打电话为各种案件提供线索。
Information provided by a CI was put before the jury. 一名秘密线人提供的信息被提交给了陪审团。
- More examples
- The agent tried for three years to get into one gangster's dope house but never found a CI who could buy from the target.
- Carter's daughter believes there may be a connection between her mother's career as a CI and the murder case.
- Gomez sold 6 Ecstasy tablets to a CI who was wearing a wire.
- "Most times a CI is a person that has been caught doing something illegal and law enforcement has struck a deal with them", he says.