That's not what I meant. [He frowns, swatting her hand away from his chest once she's had her say.] I meant what do you know about actual murder. Not just seein' people die or even helping plan it, but actually being directly responsible for the death of another human being. Someone who didn't deserve it.

[Because, from the sounds of things, this mysterious mother figure kind of deserved it. People bent on the destruction of the world are a class all their own who deserves whatever they get.]