15 Suspects For the Killer on Scream Queens Season 2

Why he might be the killer:

• Let's begin with the obvious: Dr. Mike kills someone in the very first episode, so we already know he's capable of diabolical things.

Why he might not be the killer:

• Dr. Mike is motivated by not wanting to work on Halloween, a weak excuse, but an excuse nonetheless. What motive would he have for returning to the hospital to go on a rampage? Also, he's supposedly dead.