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 Jani Lane's demons ultimately proved his undoing. 
 
 The former Warrant singer died of alcohol poisoning, or, officially speaking, acute ethanol poisoning, Los Angeles County Assistant Chief Coroner Ed Winter confirmed Wednesday to E! News. 
 
 Lane was found unresponsive and pronounced dead Aug. 11 in a San Fernando Valley hotel room. 
 
 READ: Jani Lane's Death Warrants Touching Tributes: "He Was a True Talent" 
 
 Authorities previously said that a half-empty bottle of vodka and prescription medication were near the body. 
 
 Investigators did not suspect foul play and an autopsy performed the following day proved inconclusive, but several friends of the rocker suspected that Lane's drinking problem had directly caused his death. 
 
 "It's no secret that Jani's had a difficult time for many years. Our genre of music has lost a real legend. I'll miss him," Lane's friend and onetime rep Sullivan Brigg told E! News at the time. 
 
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 Jani Lane, the former frontman of Warrant, died of alcohol poisoning, the Los Angeles coronor determined. 
 
 
 
 The singer, who wrote and sang several hits for the group, including “Cherry Pie,” “I Saw Red” and “Down Boys,” was found dead in August in a Los Angeles motel room. He was 47. At the time, the autoposy was inconclusive and toxicology tests were still pending. 
 
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 The coroner’s Lt. Larry Dietz said the cause of death was acute ethanol intoxication, City News Service reported Wednesday. 
 
 
 
 Lane, whose real name was John Kennedy Oswald left the 1980s glam band Warrant in 2008. The singer had a history of alcohol-related arrests. He was taken into custody in June 2009 for reportedly crashing into a parked car. A year later, he was arrested for a similar incident that landed him in jail for 120 days. 
 
 STORY: Warrant's Jani Lane: 5 Things to Know 
 
 
 
 When Lane’s body was found at the Comfort Inn in Woodland Hills, Slash, Bret Michaels and other rockers expressed their sympathies. 
 
 
 
 “We'd like to offer our deepest condolences to the family of Jani Lane regarding their loss,” wrote former bandmate Michaels. “Respectfully, Bret and all at MEGI.” 
 
 
 
 A group of bands, including Great White, Quiet Riot, LA Guns, Enuff Z'nuff and Slammin' Gladys, performed a tribute concert for Lane on August 29 in Los Angeles. His former band, Warrant, also paid tribute to the lead singer with a show in North Dakota.
– Nearly two months later, an answer to what killed Jani Lane: alcohol poisoning. The Los Angeles County Coroner's Office determined that the former Warrant frontman died from acute ethanol intoxication, the AP reports. E! notes that a half-empty vodka bottle and prescription drugs were found alongside Lane's body in a hotel room. The Hollywood Reporter adds that Lane had been arrested twice, and put in jail once, for driving under the influence.