"But his father," Theo continues, "constantly sucked up to the Dark Lord. He literally would do anything he wanted – that’s why Draco has the Dark Mark. He didn’t want it, but his father insisted. Lucius even made him promise to kill Dumbledore, but he couldn’t go through with it. That was a step too far for Draco, and he left. I didn’t hear from him until he came back to the Manor four months ago."