http://www.nbcbayarea.com/news/local/Marin-County-Sheriffs-Office-Investigating-Death-of-Actor-Robin-Williams-270820641.html?_osource=SocialFlowTwt_BAYBrandhttp://www.cbc.ca/news/arts/robin-williams-dead-of-apparent-suicide-1.2733770자살로 추정