a stool pigeon

a person, especially a criminal, who secretly gives information to the police in order to help them catch other criminals Once they discovered he was a stool pigeon, it was only a matter of time before they had him killed.

Common Names:

Name	Pronounced	Usage
Lita	-	English
Rees	-	Welsh
Noella	-	French
Swarna	-	Indian, Telugu, Hindi
Aqissiaq	-	Native American, Greenlandic
ÚLfr	-	Ancient Scandinavian