Len Steckler, an American photographer, painter, film director, cinematographer and producer
Anne-Marie Steckler was the daughter of Christian Steckler, an instrument maker frequented by harpist and composer Johann Baptist Krumpholtz in Metz, France.
Subsequent reissues of the film (under the title The Maniacs Are Loose) added a color prologue with famed hypnotist Ormond McGill (billed as "The Amazing Ormond"), as well as extended color sequences of a "hypnodisc" during the moments where Steckler and company would burst out into the audience.
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After the success of Steckler's first independent feature, The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies (1963), he and producer George J. Morgan decided to cash in on the "psycho-killer" craze in Hollywood, brought upon by Alfred Hitchcock's Psycho.