Question: The pornahraphic film based on the unidentified killer of four men and three women, in the Bay Area in the 1960's and 1970's was released in what year?
Sentence (from "Paturis Park murders"): The murders took place in Paturis Park ("Parque dos Paturis") in Carapicuíba, Brazil, and were perpetrated by an unidentified killer dubbed the "Rainbow Maniac".
Relevant evidence: No