 Scully tells Doggett that while the DNA test disproves Fassl 's culpability , it implicates a possible blood relative ; Fassl , however , is an only child . Reyes proposes that the murders are being conducted by an entity rather than a person . Meanwhile , Fassl approaches Assistant District Attorney Damon Kaylor and begs to be sent back to prison . Kaylor refuses , but is killed by the Bearded Man . After hearing of Kaylor 's disappearance , Reyes theorizes that Fassl 's piety and his unwillingness to acknowledge his darker half has given him the unwanted ability to physically change into another , more violent person . 
