Macbeth's third murderer

The Unsuspected Third Murderer There are many different theories and opinions about who the Third Murderer may be. Each suspect has his or her own attestation for being the Third Murderer, and each suspect has a reasoning of why they aren’t. There is always new pieces of substantiation emerging, however, the majority of the evidence supports Macbeth’s servant, Seyton, as the Third Murderer. Macbeth obviously needed someone to make sure that the murderers …

…very last words were, “Thou mayst revenge. O slave!” (Act 3, Scene 3, Line 19). The term ‘slave’ is an obvious derogative title of a servant and is Banquo’s way of identifying the Third Murderer. The exact identification of the Third Murderer may forever be argued and debated. Each hint and clue can be interpreted differently, and while a majority of them point toward Seyton, only the original audience and Shakespeare himself will ever know for sure.