Corey Haim has been linked to an “illegal and massive” prescription drug ring. Police found four bottles of prescription medication in Haim’s room after his death. It has emerged that one of the medications was issued to Haim using an unauthorized prescription. California State Attorney General Jerry Brown says his office is launching an investigation after Haim’s name was found during a probe of fraudulent drug-prescription pads. Brown said the “drug ring” operates by ordering prescription pads stolen from legitimate doctors. The pads are then sold to prescription drug addicts or dealers. Deputy Coroner Ed Winter says he has refused to rule out prescription drug overdose as the official cause of Haim’s death. He admitted other medical conditions had been found during the post-mortem, but said the coroner would wait for toxicology results before ruling on the death. “You can have somebody with an enlarged heart and some other medical conditions, but you don’t know if the actual cause of death is from illegal substances, medication or heart failure,” Winter said. “There were some preliminary findings, and we agreed to let the mother know what those were. It was explained to her that… there wouldn’t be a final cause of death until the final toxicology tests are back.” Haim’s funeral is being held today at Steeles Memorial Chapel.