Overview
The Night Stalker is an American made for television horror film which aired on ABC on January 18, 1972, as their ABC Movie of the Week. In the film, an investigative reporter, played by Darren McGavin, comes to suspect that a serial killer in the Las Vegas area is actually a vampire.
Plot
A series of murders plague the Las Vegas Strip. All of the victims had their bodies drained of blood. Carl Kolchak, a veteran reporter who has been fired from newspapers across the country due to his tenacious and unprofessional approach, thinks the killer believes himself to be a vampire. His managing editor, Tony Vincenzo, refuses to run the story under the vampire angle without proof, arguing it could cause a panic and soil the paper's reputation.
When a man attempts to rob a hospital of its blood supply, the police are called in. The thief is shot multiple times without effect, and escapes, outrunning a police car and motorcycle. From eyewitness testimony, the police positively identify the thief as 70-year-old Janos Skorzeny, who is the prime suspect in multiple homicides extending back years, all involving massive loss of blood.
Kolchak's girlfriend, Gail Foster, a casino "change girl," urges him to explore vampire lore. The evidence persuades Kolchak that Skorzeny is a real vampire. Following another failed attempt to capture Skorzeny, the authorities strike a deal with Kolchak to eschew traditional investigative methods for his vampire-centric approach in exchange for giving him exclusive rights to the story. Acting on a tip, Kolchak locates Skorzeny's safe house and pursues the story on his own, wanting unhindered access to the evidence. He photographs stolen blood packets in the refrigerator, a coffin with native soil inside, a victim bound and gagged to a bed with an intravenous line drawing blood, and other incriminating evidence. Compromised when Skorzeny returns, Kolchak is wrestled to the floor. His friend, FBI Agent Bernie Jenks, arrives and joins the fight. Realizing that dawn has broken, Kolchak and Jenks pull back the shades and stake Skorzeny, just as authorities burst through the front door.
From Wikipedia (CC BY-SA 4.0).