-Answer: At the end of "Julius Caesar", Cassius is slain by his slave, Pindarus.
-Explanation: Pindarus was very loyal to Cassius and became his servant. The two initially met during a meeting amongst Brutus and Cassius located at Pindarus' master's place, who soon after develop serious tension. Pindarus feels incapable of disobeying Cassius, his master, and develops a sense of incompetence when Cassius requests Pindarus to slay him. The very same dagger that allegedly 'ran through Caesar's bowels' was used unwillingly by Pindarus to murder Cassius. Consequently, the oath and pact between the two is broken, and Pindarus regains his long lost freedom.