Now that the official cause of Cory Monteith’s death, a lethal mixture of heroin and alcohol, has been released, there’s been speculation that he may have used a “bad batch” of the drug. Girlfriend Lea Michele is said to be inconsolable as she plans funeral arrangements with his family. A source says she staged an intervention for him in the spring and didn’t know he relapsed with heroin. Although, a friend who was with him at Vancouver’s Portside Pub the day he died says he wasn’t drinking, and even saw him at an AA meeting. But sadly, that may just have been a cover.