Snuff is a 1976 splatter film, and is most notorious for being marketed as if it were an actual snuff film. This picture contributed to the urban legend of snuff films, although the concept did not originate with it. Info from wikipedia.org
Originally released as THE SLAUGHTER by notorious filmmakers Michael and Roberta Findlay , the movie sat on the shelf for five years until enterprising producer/distributor Allan Shackleton devised a controversial new ending and released it as SNUFF.
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