Special Agent Victor Hendrickson
Victor isn't a real boy. He was a magical
construct in the employ of Teneke Hsiao,
created for the sole purpose of putting away
Dean and Sam Winchester.

He thought he had him dead to rights with the
circumstantial evidence, and the eye witnesses
in the shape shifter cases.  He wasn't
expecting Regan Bruner to be as thorough in
her investigation, or as well connected as she
turned out to be.

Once his position in the FBI was revealed to be
fraudulent he had no choice but to abandon
his pursuit and return to more active employ
with Hsiao.