Story highlights A mixture of alcohol and cocaine killed Scott Weiland, according to toxicology results

A history of drug abuse was a contributing factor in his death, the medical examiner says

The Stone Temple Pilots frontman's career was overshadowed by his battle with drug addiction

(CNN) Singer Scott Weiland died of an accidental overdose of alcohol and drugs, the Hennepin County (Minnesota) Medical Examiner's Office said Friday.

The Stone Temple Pilots and Velvet Revolver frontman died December 3 while on tour with his band the Wildabouts. He was 48.

The toxicology test results indicate that his death was caused by a mixture of alcohol, cocaine and MDA, a drug similar to MDMA or ecstasy. Weiland's history of drug abuse was a contributing factor in his death, according to a news release from the medical examiner's office.

"Other significant conditions are noted as atherosclerotic cardiovascular disease, history of asthma and multi-substance dependence," it said.

Weiland's extraordinary career often was overshadowed by a constant battle with drug addiction. In a powerful essay after his death, his ex-wife urged fans and the media not to glorify his death.

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