Here's the coroner's office release:
The cause of death is mixed drug (ethanol and oxymorphone) intoxication. These substances had central nervous system and respiratory depressant effects. Autopsy revealed a moderately enlarged heart (460 grams). The decedent had a history of probable sleep apnea. Cardiomegaly and probable sleep apnea are significant contributing factors to death. The manner of death is accident.
This year's film festival was dedicated to George Hickenlooper's memory. Casino Jack, starring Kevin Spacey, is expected to open at theaters on December 17. Here's the trailer:
More from our Television & Film archive: "George Hickenlooper: Despite his death, series about cousin John Hickenlooper moves forward."