Not sure it counts as a 'murder' rather than an 'execution,' given that Daphne really was a traitor.

Regarding being haunted -- yeah, I'm something of an expert, actually. As I expect you know.

Here's what I wonder if you dream: something changes, there's a new plan, but it's too late because you've already cast the curse, and Harry dies anyway.

Or do you dream about what happened with Our Lord? Or maybe not, since you weren't there for that part, it would be all conjecture.