Great. According to Xavier's people, Frost's powers are pretty certain in these kinds of situations, and the physical evidence at the scene supports what she said went down. I think we can rule out that it's an elaborate hoax by the Brotherhood.

There's questions either way. Creed doesn't normally collect the bodies he makes, so its possible that at least some of them are still alive. But, if they wanted prisoners in the first place, why did they use lethal methods during the attack? Dani and Kane would have bled to death in a few minutes at best from their injuries, they took out both Jay's wings and part of his spine, which even if he survived the system shock somehow leaves him permenantly crippled physically, and based on the location that was described of the shots, I think a professional marksman got Pete through the spine as well.

So let's consider that they might still be technically alive, but in comas, medically on the edge. Would that effect the readings in the same fashion?