All Your Questions About Heroin And Fentanyl Answered (VIDEO)

WATCH: All Your Questions About Heroin And Fentanyl Answered
NEW YORK, NY - FEBRUARY 03: A vigil of candles, flowers and portraits sits outside the apartment of actor Phillip Seymour Hoffman, on February 3, 2014 in the West Village neighborhood of New York City. Hoffman died yesterday of an alleged drug overdose; he was found by a friend in his bathroom with a syringe in his arm. (Photo by Andrew Burton/Getty Images)
NEW YORK, NY - FEBRUARY 03: A vigil of candles, flowers and portraits sits outside the apartment of actor Phillip Seymour Hoffman, on February 3, 2014 in the West Village neighborhood of New York City. Hoffman died yesterday of an alleged drug overdose; he was found by a friend in his bathroom with a syringe in his arm. (Photo by Andrew Burton/Getty Images)

With up to 50 bags of heroin found in Philip Seymour Hoffman's apartment, police are speculating that a deadly strain of the drug may have been involved. Deaths in New York and Pennsylvania are linked to heroin containing fentanyl. Forensic chemist James Wesley joined HuffPost Live to answer questions about the potentially fatal drug.

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