Who did john blame on for putting glue in the key hole in the pigman?

In "The Pigman" by Paul Zindel, John blames his friend, Norton, for putting glue in the keyhole of Mr. Pignati's house. John suspects that Norton, known for his mischievous behavior, is responsible for the prank. This act contributes to the overall theme of irresponsibility and the consequences of their actions in the story.