Mulder: What did we learn in our first day at the academy, Scully? Each fingerprint is unique, these are a perfect match.
Scully: Are you suggesting that I go before the Violent Crime Section and present a profile declaring that these murders were done by aliens?
Mulder: No, of course not, I find no evidence of alien involvement.
Scully: Well, what then? That, that this is the work of a hundred year old serial killer who is capable of overpowering a healthy six foot two businessman.
Mulder: And he should stick out in a crowd with ten inch fingers.
Scully: Look, bottom line, this is Colton's case.
Mulder: Our X-file dates back to 1903, we had it first.