The Secret of the Black Widow (1963)

People are being shot with bullets shaped like black widow spiders, and now it's up to London Sensation reporter Welby to track down the killer. When Welby discovers that the leader of an old Mexican expedition was killed by the bite of a black widow, his investigation leads him to the darkest corners of the human psyche. O.W. Fischer, Klaus Kinski, and Doris Kirchner star. ~ Jason Buchanan, Rovi