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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. 
 
 GALLERY: Celebrity Deaths in 2011 ||||| Another one?! Former lead singer of Warrant Jani Lane joins the ranks of rock stars dying too soon: Lane was found dead Thursday evening at a Comfort Inn hotel in Woodland Hills, Los Angeles. Cause of death has yet to be determined, but Lane's struggles with alcoholism were no secret. He was just 47 years old. 
 
 Except in my mind, he'll always be the young rocker in leather pants from the poster that hung on my bedroom wall when I was 14 ... long blond hair, big blue eyes, attitude to spare. 
 
 Probably it was the attitude that got him into trouble ... 
 
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– 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.