Donna (Linda Emond) is one of the "Death Rattle" producers, and at the end of episode nine, Oliver, Mabel, and Charles are convinced she's the one who killed Ben.
During episode eight, she's very much stressed, and everyone assumes it's because Oliver has invited a critic to the sitzprobe. Donna also calls Ben's performance in the original "Death Rattle" "stiff as a wooden board."
In episode nine, Howard's attempts to piece together the paper shreddings finally pay off, and the team learns that someone shredded Maxine's negative review of "Death Rattle," where she referred to Ben the same way. So, Donna got her hands on an early review, shredded it, and killed Ben to try to save her son's reputation. She sprinkled rat poison on the cookies, knowing Ben could never resist — though she ultimately tells the gang she just meant to make him sick so he couldn't do the show.
But, as we suspected, in the finale we learn she didn't push Ben down the elevator shaft.
Our verdict: Guilty
