Stream Copycat Killer Online Free – Watch Full Movie from Home at 123Movies. . Based on the best-selling novel by Miyuki Miyabe. The title “Mohouhan” means “Copycat”, and it tells the story of a criminal who abducts and kills women, and those who try to catch him. Nakai is cast as a cold-blooded, intelligent and evil guy who uses the media to announce and show his murders live to the public.