Speculation continues to swirl around the death of actor David Carradine.

Early police statements pegged the 72-year-old's death Wednesday in Bangkok, Thailand as a suspected suicide.

But a Thai forensic scientist said Friday that Carradine may have died attempting a sex act known as auto-erotic asphyxiation, while a rep for the actor told TMZ that the family was told by Thai authorities that Carradine's hands were tied behind his back, and so suspect foul play.

The "Kill Bill" star's body was discovered Thursday in his luxury suite at Bangkok's Swissotel Nai Lert Park Hotel. Police Lt. Gen. Worapong Chewprecha told reporters that Carradine was found with a rope "tied around his penis and another rope around his neck."

"The two ropes were tied together," he said. "It is unclear whether he committed suicide or not or he died of suffocation or heart failure due to an orgasm."