The Stool Pigeon is a 1915 American crime film directed by Lon Chaney and starring J. Warren Kerrigan, Vera Sisson and George Periolat.
Walter Jason, a young man from the country, comes to the big city to find a job but fails to do so.
Trumble spots Jason down at the river's edge appearing depressed and prevents the young man from committing suicide.
The plot goes as planned, except that Jason notices that the woman he is with is suddenly missing a beauty mark she had earlier in the evening.
The story is replete with situations of a tense character, and is so constructed that the climax can hardly be foretold until it arrives, a great point in its credit.