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BEVERLY HILLS, CA - JANUARY 15:  Actor Cory Monteith arrives at The Weinstein Company's 2012 Golden Globe Awards After Party at The Beverly Hilton hotel on January 15, 2012 in Beverly Hills, California.  (Photo by Frazer Harrison/Getty Images)
BEVERLY HILLS, CA - JANUARY 15:  Actor Cory Monteith arrives at The Weinstein Company's 2012 Golden Globe Awards After Party at The Beverly Hilton hotel on January 15, 2012 in Beverly Hills, California.  (Photo by Frazer Harrison/Getty Images)

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Heroin, alcohol killed Cory Monteith

Erin Burnett talks to Dr. Sanjay Gupta about Glee star Cory Monteith's cause of death.

Heroin, alcohol killed Cory Monteith

Erin Burnett talks to Dr. Sanjay Gupta about Glee star Cory Monteith's cause of death.