Sayyiduna Abdullah (may Allah be pleased with him) relates from the Prophet (peace and blessings be upon him): "On the Day of Resurrection a man will come holding another by the hand and will say: O my Lord, this man killed me. Allah Almighty will ask: Why did you kill him? He will say: So that so-and-so might have dominance. Allah Almighty will say: It was not for so-and-so; now bear his sin as well."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16802