Revealing mistake: During the autopsy, right after Scully has the vision of her daughter, the body of Paula Koklos can be seen to move (watch her hands and neck). (00:24:05)
Continuity mistake: If the Kernoffs were really devoted Catholics why would they have waited six years to have Dara baptised? (00:00:40)
Continuity mistake: When Dara walks toward the angel, there is only one car, parked on the right side of the street, but when her father approaches her, there is another car parked on the opposite side of the street. (00:02:50)
Other mistake: In the police station, Scully looks twice at a photograph of one of the dead kneeling girls, whose eyes should be burned out in the photograph, but they are normal.
Answer: He was being facetious. He doesn't specifically know that information, he was merely giving examples of the types of information he has access to.
I think so too.
lionhead