Mr. Palaccio is a fictional man who was murdered by Mr. Montone.
When Principal Skinner offered Bart the position of hall monitor, Bart wasn't sure, because he didn't want to squeal on the students. He imagined himself testifying in court against Mr. Montone. Bart's voice was electronically altered to sound like Steve Allen. Bart said he saw that Mr. Montone sealed Mr. Palaccio in an oil drum and rolled him off the pier. Mr. Montone became angry and ran to Bart with a knife, trying to kill him.