A new report has surfaced that the late singer Michael Jackson was actively involved in trying to beat his drug addiction. According to newly released court papers obtained by The Sun, Jackson underwent surgery in 2003 to be fitted with a secret medical implant designed to block the effects of opiates. The device apparently periodically dosed him with Narcan—a drug that blocks pleasure receptors in the brain and is typically prescribed for morphine or heroin addicts. The court papers contain testimony from Beverly Hills anaesthetist David Fournier, who treated Jackson in the ’90s and early 2000s. The papers state that “Fournier believed Jackson had deceived him by not telling him about a ‘Narcan implant’ Jackson had inserted before a surgical procedure Fournier was helping with.” The testimony will be used as evidence in the civil case brought by Jackson’s mother and children against concert promoter AEG Live. Jackson’s family alleges that the promoters were complicit in the singer’s fatal drug overdose because they pressured Jackson’s physician Dr. Conrad Murray to get him ready for his 2009 “This Is It” comeback tour by “any means necessary,” despite his fragile health. They are seeking damages equivalent to what the singer would have earned over the course of his life had he not died in 2009, which could result in a several billion dollar payout. The family reportedly tried to have the opiate implant evidence thrown out in court, but were overruled by the judge.