Possible Clues:

• First to strike Caesar
• First assassin to attack Caesar
• Who says 'Speak, hands, for me!' in 'Julius Caesar'
• Co-conspirator with Brutus and Cassius
• "Speak, hands, for me!" speaker
• He struck Caesar 'like a cur'
• 'Envious' assassin of Caesar
• First of the conspirators to stab Julius Caesar
• His hands spoke for him at the Capitol
• Maniac sacrificed, holding up envious assassin