Popsugar Entertainment Scream Queens Who Is the Killer on Scream Queens? Who's the Scream Queens Killer? The Latest Theories November 11, 2015 by Shannon Vestal Robson View On One Page Photo 12 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 12 Grace Why she might be the killer: Because it's not obvious. She's set up to be the heroine, so making her the killer would really throw you off. Why she might not be the killer: We keep seeing Grace being stalked by the red devil, so it's probably not her. Previous Next Start Slideshow Scream QueensFall TVTV