Carradine's naked body was discovered hanging in a Bangkok, Thailand, hotel suite on Thursday morning. Local reports suggested he committed suicide, but a statement from Carradine's representative indicates the actor died when a sex act went wrong.
Rumors that Carradine died attempting autoerotic asphyxiation -- where victims achieve heightened sexual pleasure by restricting their air supply -- are backed up by a quote a Bangkok police officer gave to British newspaper The Sun.
But the star's lawyer and longtime friend Vicki Roberts refuses to accept that he killed himself or died in a sex game -- and is calling on Thai authorities to launch a murder investigation.
Roberts tells RadarOnline, "I believe that there may have been foul play. Anybody could stage a suicide after a murder."
The attorney also denies claims by Carradine's ex-wife Marina that he engaged in sexual behavior that was dangerous to his health during their marriage. Roberts claims the accusations, which appear in papers from the ex-couple's 2001 divorce, are "extremely inflammatory and completely false."
Coroners at Bangkok's Chulalongkorn hospital completed an autopsy on Friday, although the cause of death is not expected to be determined until the results from toxicity tests are in.
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