They don’t have to die.
He would need to wipe their memories first, one would assume; right now, the only witnesses to the scene remember nothing, and Harry (as an Occlumens) can pretend to not have knowledge of it.
He would need to wipe their memories first, one would assume; right now, the only witnesses to the scene remember nothing, and Harry (as an Occlumens) can pretend to not have knowledge of it.