The "Kolchak" in question is actually reporter Carl Kolchak, first introduced in the 1972 TV movie The Night Stalker as a down-on-his-luck newspaper man in Las Vegas who stumbles upon the story ...

Carl Kolchak was a reporter for Chicago's Independent News Service, and a trouble magnet for situations involving the supernatural. Kolchak turned his investigative skills to vampires, werewolves ...