Alfred L. Werker

Vincent Price is Dr. Cross, a psychiatrist who murders his wife and discovers that the only witness is a neighbor who goes into shock after witnessing the carnage. Her well-meaning husband has her committed to the sanitarium run by Dr. Cross, who resolves to silence her forever by shocking her to death with an overdose of insulin.

"Based on one of the most notorious, unsolved cases in Los Angeles' police history, [this film features] an intelligent and cunning criminal who kills a cop, steals electronic equipment and robs liquor stores without leaving a clue. The police department persists in their [sic] search for him, systematically using the latest scientific methods of detection. The culprit is finally identified, leading to a frenetic pursuit through the massive drainage...