Tokyo:
Japanese police have arrested a man for allegedly drugging and sexually assaulting more than 100 women who believed they were taking part in a medical study, detectives and local media said today.

Detectives say scores of women responded to adverts seeking volunteers for "clinical research measuring blood pressure during sleep" over two years to November 2013. They believe Hideyuki Noguchi, 54, gave the women sedatives after luring them to hotels and hot spring resorts. Once the women were unconscious, he raped them and filmed each assault, police said.

Footage of the attacks was posted on the Internet or sold to producers of porn films
http://www.ndtv.com/world-news/over-...l-study-736641