Brutus
SERVILIA: Here, Brutus refers to a practice that was part of the violent politics of ancient Rome. Sometimes, when a prominent figure tried to address the plebeians in the forum, he was physically attacked by the servants of a political opponent.
RALPH: Of course, the opponent would publicly disavow any responsibility, and would energetically reprimand his servants for such a blatantly illegal act.
SERVILIA: Brutus uses this metaphor to suggest that the conspirators should express similar hypocritical sentiments. Although they have killed Caesar, they will speak their heartfelt regret that such a bloody act has occurred.
RALPH: It’s worth thinking about how this affects our opinion of Brutus. Can he be on the side of the people and at the same time try to manipulate their opinion of him?