[Snape watches Draco for a long moment. Weighing the truth here, it's value -- the boy is already upset and irate, what can one more painful truth.]

Did he really? There were pockets of resistance at every corner. Even students organizing. People were willing to die to see him stopped. He didn't have everything in his palm.

And there was still the wand. Even with my death, it did not cleave to him. It had another master.

Who was was-- I cannot say. I fear to think it might've been you. You disarmed Albus. I merely gave him the coup de grace.

[So that Draco didn't have to. So that Bellatrix wouldn't start playing with her food... for any other reason then the one Draco thinks.]