"The autopsy findings and the evidence thus far available demonstrate that Mr. Carradine's death was not the result of suicide," Dr. Michael Baden said in a prepared statement released through the Associated Press Thursday. "However, to reach a final determination as to the cause and the manner of death we must wait for further information from Thailand as to the scene findings and the completion of the crime laboratory and toxicology studies that are still being performed."
While Thai police initially said the actor had likely committed suicide, details soon emerged about how he was found – nude, with cords wrapped around his wrists, neck and genitals – that gave rise to speculation Carradine had died accidentally during an autoerotic act.
Citing conflicting reports about the circumstances of the death, the actor's brother, Keith Carradine last week asked the FBI to help determine if someone else may have been involved.
Brother's DisbeliefCarradine's brother Bruce told PEOPLE. "In a sad way, I'm glad to hear it confirmed that David didn't commit suicide. I never believed he took his own life. He just had too much to live for."
Thursday the Kill Bill star's brothers, Keith and Robert Carradine, thanked the public for their support and asked that people give them privacy until their half-brother is buried, and until investigators have examined all the evidence and figure out what happened.
"His is a devastating loss for our family and we greatly appreciate the compassion pouring in from all over the world," Keith says. "We wish to express our gratitude to the government of Thailand and the Lumpini Police Station in Bangkok for their support and cooperation and to the U.S. Department of State for their assistance."
Robert Carradine adds: "Until we have all of the pending results of the investigation we respectfully ask that we be allowed to lay our beloved brother, husband and father, grandfather and great-grandfather to rest in peace and with dignity. Once the investigation is fully completed and definitive conclusions have been reached, we will address the findings with the public. Thank you for your understanding during this profoundly painful time."
According to a source, Carradine's funeral will be held on Saturday in California.
With reporting by JOHNNY DODD