The Los Angeles County Medical Examiner has determined that Tom Petty died last fall as a result of "multisystem organ failure" caused by an accidental drug overdose of several medications.
The Gainesville, FL singer passed away October 2 at the age of 66 in a Santa Monica, CA hospital after being found unconscious and in cardiac arrest at his Malibu home.
The Los Angeles Times reports an autopsy found that Petty had several drugs in his system, including fentanyl, oxycodone, temazepam, alprazolam, citalopram, acetylfentanyl and despropionyl fentanyl.
Petty had been prescribed the drugs to treat emphysema, knee issues, a fractured hip and coronary artery atherosclerosis - a buildup of plaque that restricts blood flow to the arteries that supply the heart with blood.
In a joint statement by Petty's widow, Dana, and daughter, Adria, the pair reveal the details from a meeting with representatives from the Medical Examiner's Office that provide some context and background to the rocker's loss.