An investigation by the Los Angeles County coroner's office has concluded that "acute ethanol poisoning" killed former Warrant singer Jani Lane, law enforcement sources tell TMZ.com. Lane was found dead in a hotel room in Woodland Hills, Calif., on Aug. 11. He was 47 years old.

A story posted on TMZ.com the day after Lane's death reported that a half-empty bottle of vodka and prescription medication were found in Lane’s room when paramedics arrived on the scene. Also found was a mysterious note in his back pocket, suggesting to family members that somebody was with Lane at time of or right before his death. There seems to be no mention of prescription pills associated with Lane' death in the coroner's report.

Following his death, Lane's older sister, Vicky Oswald-Ley, said that the singer had been fighting alcoholism for more than 10 years and that she believed that in the end, he lost the fight. “Alcoholism is not something he chose,” Oswald-Ley told RadarOnline, insisting that drinking was likely the cause of Lane’s death. “It’s something he fought every day and it just won.”

Lane was Warrant's frontman at their height of popularity in the late '80s and early '90s, singing such hits as 'Heaven' and 'Sometimes She Cries' from their debut, 1989's 'Dirty Rotten Filthy Stinking Rich,' and the title track to the band's multi-platinum 1990 album, 'Cherry Pie.' You can see our list of the 10 Best Warrant Songs right here.