 Before attending the OA meeting , Rob is visited by Mulder and Scully , both who inform him that Spinks has disappeared ; Mulder then reveals about Pankow 's missing brain and that a " tiny shark 's tooth " was discovered by Scully embedded in the skull . Mulder deduces that a " genetic freak " is responsible , which Rob nervously laughs it off . After the agents leave , Rob attends the OA meeting . At the meeting , he sees his kind landlady , Sylvia <unk> . Although he does not respond well to the meeting ( by discreetly detailing the taste of a brain as " salty " , " juicy " , and " buttery " and especially visualizing a pulsing brain when a man turned to Sylvia ) , Rob and Sylvia bond on the trip home . Unfortunately , his hunger is far too overpowering and he is reluctantly compelled to feed upon her . To cover up her murder , Rob disposes of her body and smashes up his own apartment with Spinks ' baseball bat . He tells Mulder and Scully that Spinks showed up and accused him of being the killer . Mulder then tells Rob if he recognizes Kiziak , the private investigator , but Rob says no . Both agents leave to find Sylvia . 
