Scream Queens: Everyone Who Is Definitely in on the Killing

Our first 100-percent-confirmed killer. Dean Munsch gleefully admits to killing and dismembering her ex-husband, then setting up his new wife Feather to take the fall. While Munsch sounds like she's claiming to use the serial murdering around her as the perfect time to strike — and thus, meaning that she is not the main Red Devil killer — she is still a murderer. Could she be the puppet-master? Absolutely.