Police reporter?

Usage examples of stoolie.

My idea was to wander about doing nothing, always avoiding the boss, and avoiding the stoolies who might report to the boss.

Langstretch ops and stringers, bounty hunters, skip-tracers, informers, stoolies, and such.

I was scared shitless that he'd kill me anyway, so when I heard that the Boulevard-Citizens heisters took some of Benny's money along with the bank's, I shook down stoolies until I got Bobby De Witt on a platter.