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More tests in Johns case

An autopsy conducted on the body of *Perth *-born-and-raised singer *Michael Johns *has proved inconclusive.

The former American Idol contestant, below, who competed as a finalist on series seven, was found dead at a friend's California home on Friday, a day after allegedly seeking medical help for pain and swelling in his leg following a sprained ankle.

Reports suggested the 35- year-old, who grew up with the name *Michael Lee *and moved to the US on a tennis scholarship in 1997, had suffered a fatal blood clot due to the injury but officials at the Orange County Coroner's Office have decided to defer the cause of death pending toxicology results, according to TMZ.

TMZ initially reported Johns' death was caused by a blood clot in his ankle but is now saying that the official cause of death has not yet been determined.

"The police were informed Johns had engaged in heavy alcohol use before his death. And we're told he was a heavy drinker," a law enforcement source allegedly told TMZ. "If there was a blood clot, it would appear it was not clearly the cause of death. The fact toxicology tests are being performed suggests the coroner wants to know if alcohol and/or drugs played a part in Johns' death."