Kirk: "I watched you open fire in a room full of unarmed Starfleet officers. You killed them in cold blood."
Khan: "Marcus took my crew from me!"
Kirk: "You are a murderer!"
Khan: "He used my friends to control me. I tried to smuggle them to safety by concealing them in the very weapons I have designed. But I was discovered. I had no choice but to escape alone. And when I did, I had every reason to suspect that Marcus had killed every single one of the people I hold most dear. So I responded in kind. My crew is my family, Kirk. Is there anything you would not do for your family?"