When Mindy is murdered by LeatherFace GhostFace, it couldn't have been Brody under the costume because he was upstairs talking to the police, however there was no confirmation of a second Killer working for Rachel.
When Ronnie, Lainey and Brody are reading their scripts, they stop and Brody throws his script behind the sofa. However in the next frame he holds it open in his hands when he didn't have a chance to grab it.