informant
US
UK informer, informant n: (person: informs police) (向警方)
SC 密探，检举者，告密者 mì tàn，jiǎn jǔ zhě，gào mì zhě
SC 线人，线民 xiàn rén，xiàn mín(给警方提供情资)
Police found out where they were hiding from an informer.
informer, informant n: (person: provides information)
SC 提供信息者 tí gōng xìn xī zhě
SC 通知者 tí gōng xìn xī zhě，tōng zhī zhě
The king's informants told him of all that occurred within the palace.