Kolchak: The Night Strangler (1973). Investigative reporter Kolchak takes up another case in Seattle to help local police identify a unique quirky serial strangler. Kolchak learns from the coroner's report that the all the victims' necks were crushed with brute inhuman strength, drained blood and traces of rotting flesh on their necks. After Kolchak consults a criminal records librarian to research other similar unsolved anomalies, he realizes the same strangler has struck before, again and again and again, every 21 years and then goes into hiding, with records dating back to the year 1889. When he confronts the local police about his study, as happened last time, they show a strong normality bias and do their best to refute certain evidence. Kolchak again has to come up with solid proof that the serial strangler is well over 100 years of age and may - or may not - be human.