The actor was found dead on 13 July (13) after failing to check out as a guest at the Fairmont Pacific Rim hotel.
First responders found drug paraphernalia "including a spoon with drug residue and a used hypodermic needle" in the room, plus two empty bottles of champagne. Monteith returned to his suite just after 2am on 13 July (13). There was no evidence he was joined by anyone else during his final hours.
The final report, released on Wednesday (02Oct13), confirms that Monteith "had a history of illicit drug use with intermittent periods of rehabilitation and of abstinence from drugs."
Experts fear his abstinence from drug use following a stint in rehab in April (13) may have lessened his tolerance, leading to the overdose that cost Monteith his life.
The actor will be remembered on a special episode of Glee, which will air in America next week (10Oct13).