Deven Davis -- wife of Korn singer Jonathan Davis -- died from the combined effects of 5 different types of drugs ... TMZ has learned.
According to new legal docs obtained by TMZ .... an autopsy revealed Deven had cocaine, heroin, clonazepam (a sedative used to treat seizures or anxiety), topiramate (nerve pain medication) and fluoxetine (used to treat depression) in her system when she died.
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