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Identify the speaker and explain the significance of the following quote: "Bob Ewell fell on his knife. He killed himself. There's a black man dead for no reason, and now the man responsible for it is dead. Let the dead bury the dead this time, Mr. Finch. I never heard tell that it's against the law for a citizen to do his utmost to prevent a crime from being committed, which is exactly what he did."
Who is Sheriff Heck Tate? This is important because Tate is saying that it's Ewell's fault Tom is dead and now he's dead too. He's also claiming that he fell on his own knife to spare Boo Radley the publicity of people knowing that he saved the children and rid the town of Ewell.