Though first described as "natural causes", Rolling Stone has posted an update on the death of Avenged Sevenfold drummer James Owen Sullivan, nicknamed "The Rev," last December. The musician died passed away at his home in in Southern California due to an accidental overdose of prescription drugs and alcohol, Toxicology reports indicate that Sullivan suffered "acute polydrug intoxication due to combined effects of Oxycodone, Oxymorphone, Diazepam/Nordiazepam and ethanol."
You can find the report here.