And here we have six missing Death Eaters . . . three dead in my service. One, too cowardly to return . . . he will pay. One, who I believe has left me forever . . . he will be killed, of course . . . and one, who remains my most faithful servant, and who has already reentered my service.
This passage is found on p.651 in the US Hardcover version of Book 4.
Anyway, Voldemort says this when he's looking around at his Death Eaters. We know that the faithful Death Eater is Barty Crouch Jr. But what about the other two? I think the one that's too cowardly to return is probably Karkaroff, which leaves the Death Eater who has left Voldemort forever and must be killed. Does that mean Voldemort already knows about Snape turning spy for Dumbledore? I was under the impression that Snape was spying by attending Death Eater meetings and reporting back to Dumbeldore. But if Voldemort knows that Snape is doing this, then why is he letting Snape live? Will Snape be the next one to die? Was Sirius Black the Death Eater that must be killed? Or could there be another Death Eater that we haven't heard about yet?
My head is spinning!!!!
What do you guys think?