Calvin and Hobbes by Bill Watterson for April 06, 1989
Calvin: Here comes Susie, back from the principal's office. Boy, does she look pale. I wonder what happened. She's talking to the teacher right now. Psst! Susie, what did they do to you? Did you get expelled? You didn't snitch on me, did you? You did snitch! You're a stoolie! A canary! Susie: You're going up the river, Calvin. Teacher: Calvin, will you come here, please?