Based on the book "The Girl on the Volkswagen Floor" by William Arthur Clark (1971) about the murder of young local schoolteacher Barbara Ann Butler in Kettering, Ohio (a suburb of Dayton).

Diane Hull, who played Maggie Dawson, is know today as one of the premiere teachers of Method acting in Los Angeles.

Joel Grey's first feature film after winning the Oscar for "Cabaret" (1972).