The autospsy results for Philip Seymour Hoffman were published today, revealing that the actor had a lethal mix of cocaine, heroin, amphetamines and psychoactive drugs known as benzodiazepines in his system when he passed away earlier this month. The initial autopsy was inconclusive, with further results needed to determine the cause of death.

The initial report from early February revealed that the actor was found dead with a hypodermic needle still stuck in his arm, and we also reported a few days after his death on February 2 that over 50 bags of heroin were found in his New York City apartment, along with syringes, paraphernalia and prescription drugs including a drug used to treat heroin addiction, a blood-pressure medication and a muscle relaxant.

Philip Seymour Hoffman had admitted his substance abuse problems last year, and he completed a detox program in May. The actor was in the middle of shooting The Hunger Games: Mockingjay Part 2 at the time of his death. Lionsgate announced just days after his death that the actor will be digitally re-created for the shots he had not yet completed.

Investigators have been trying to determine how Philip Seymour Hoffman may have obtained the heroin. Tests of the heroin found in his apartment came up negative for a powerful additive known as fentanyl, a synthetic form of morphine used to intensify the high that has been linked to deaths in other states.

Veteran jazz player Robert Vineberg has been charged with heroin possession during the investigation of the actor's death. While the musician was a friend of the late actor, he claims he did not sell Philip Seymour Hoffman the heroin that killed him, and he has not been charged with his death. Acting on an anonymous tip, police found more than 300 small bags of heroin, with a street value of $10 apiece, in Robert Vineberg's Manhattan apartment and music studio.