Related Clues:

• Payback
• Whodunit motive, perhaps
• Tit for tat
• Crime motive
• Common motive
• Retribution
• Whodunit motive
• Crime motive, often
• "A kind of wild justice": Bacon
• Crime motive, sometimes
• Whodunit motive, maybe
• Carrie's motivation
• It's sweet, it's said
• Crime motive, perhaps
• Whodunit plot device