Hungry

Mulder:  ...I think we're looking for some kind of genetic freak-- a carnivorous predator as yet unidentified.  A monster, if you will. Rob Roberts:  There's no such thing. Mulder:  Don't you believe it.  This thing definitely qualifies.  It has a biological imperative to eat.  I think it even ate that ground chuck you threw away. Rob Roberts:  Yeah?  Why? Mulder:  Because it can't kill with impunity and it knows it. It knows that the more it feeds on humans the closer it gets to getting caught but the hunger is always there.  And it satisfies it any way it can. [Rob laughs nervously.] Rob Roberts:  I'm sorry, but this is like good cop, insane cop.

Indeed.  This episode was rather Punkism light since the whole thing is from Rob's point of view.  I never though of Mulder as Columboesque but he certainly comes off that way in this episode.  Well when he's not being a Punk that is.

General Punkesque Behavior

"We'll have it our way."  Leave it to Mulder to make the juvenile joke.

Okay, so Mulder knocks on Rob Roberts' (What the hell kind of name is Rob Roberts anyway?) door.  Rob tells Mulder he can come in.  So why was it necessary for him to push his way into Rob's apartment?

Now Mulder thinks Rob is the killer (despite what Scully and all the local police believe) and he's at Rob's apartment questioning the man, why was he baiting Rob by saying that the killer was some kind of genetic freak?