"""Glee"" star Cory Monteith was <a href=""http://www.cnn.com/2013/07/14/showbiz/glee-star-dead/index.html"">found dead</a> at a hotel in Vancouver on July 13, 2013. Officials gave the cause as ""mixed drug toxicity, involving intravenous heroin use combined with the ingestion of alcohol."" Monteith had been public about his struggle with addiction and <a href=""http://marquee.blogs.cnn.com/2013/04/01/glee-star-cory-monteith-checks-into-rehab/"">checked into a rehab facility</a> in late March. He <a href=""http://www.parade.com/celebrity/2011/06/cory-monteith-glee.html"" target=""_blank"">told Parade magazine</a> that he started using drugs at 13 and had entered rehab by 19."