Four years later, Fox Mulder is notified by his former FBI supervisor, Reggie Purdue, about a note from a jewelry store robbery mocking Mulder by name. Mulder recognizes the message as being from Barnett, a sociopathic multiple murderer whom he helped capture on his first case with the Bureau. Even though Barnett supposedly died in prison, the note bears his handwriting. Purdue shows Dana Scully a video of Barnett's capture, which shows that Mulder didn't fire on Barnett due to him having a hostage, per FBI regulations. Mulder's hesitancy allowed Barnett to kill both the hostage and a fellow agent.