In "Julius Caesar," Pindarus is Cassius' slave and messenger who erroneously reports that Cassius' scout has been killed by Antony's army. Cassius decides to kill himself with Pindarus' help, setting his slave free and ordering him to hold the sword so that Cassius may impale himself on it.
Although Cassius is Pindarus' master, Pindarus nevertheless grieves for his death before fleeing Rome and exiting the play. Pindarus is directly responsible for Cassius' death; Cassius' scout Titinius is not killed but is instead welcomed by Brutus, whose forces have succeeded against Triumvir. Cassius dies understanding that this is a form of karmic revenge against him for aiding in Caesar's murder, as the sword Pindarus wields is the sword Cassius used against Caesar.
Pindarus' error leads to another tragic death. Titinius, returning to Cassius, sees the carnage, understands Cassius' error and kills himself in grief. Brutus returns and mourns the death of his friends, particularly Cassius, before announcing another siege against Antony.
Cassius' death is also a vehicle for irony. He misinterpreted portents as warnings about the danger Caesar represents rather than realizing they refer to his actions instead. He also forges pleas for aid against Caesar and allows Brutus to believe them genuine, manipulating his concerns.