Heart Attack: Natural Causes Send Madoff Billionaire to the Bottom of the Pool

The body of Jeffry Picower, the man who pulled more money -- $7 billion -- out of the Bernard Madoff Ponzi scheme, underwent an autopsy today and the cause of death is determined to be drowning as a result of a massive heart attack, according to Dr. Michael Bell, the medical examiner who performed the autopsy.

Accountant Jeffry Picower poses for a portrait at his home on January 28, 2002 in Palm Beach,...

Accountant Jeffry Picower poses for a portrait at his home on January 28, 2002 in Palm Beach, California. The man who made $7 billion in the Bernie Madoff Ponzi scheme, Jeffry Picower, was found dead in his Palm Beach, Fla., swimming pool Sunday. The Palm Beach Fire Department told ABC News that Picower had no pulse when fire rescue workers arrived at his oceanfront mansion after his wife called 911. She and his housekeeper pulled his body from the pool shortly after noon.

(Lucien Capehart/Getty Images)

Bell told ABC News that the toxicology results will take ten weeks and if there is anything found that could have contributed to Picower's death he will amend the death certificate.

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The body can now be released for burial, according to Bell.

"Usually the family will have a funeral home fax a release form, at which time we will hand over the body to the funeral home for burial," said Bell.

Picower's wife Barbara called 911 yesterday at around noon when she noticed her husband, who had been swimming in the pool outside their gigantic Palm Beach mansion, had sunk to the bottom.

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"There was a 15 minute window from the time that she saw him actually conscious and swimming in the pool until she went back out and saw that he was not responding and that he had actually gone to the bottom of the pool," a rescue worker told ABC News.

Palm Beach Fire Department spokesman Joe Sekula said that rescue workers found Picower without a pulse and though they were able to restore his pulse in the ambulance, he died at Good Samaritan Medical Center in West Palm Beach.

The Palm Beach Police Department said the investigation is ongoing, and the 911 tape will be released when the investigation has concluded.

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"There are still so many factors that can affect the length of the investigation," Palm Beach Police Department Spokeswoman Janet Kinsella told ABC News.

Picower's attorney William Zabel told ABC News Sunday that the family was shocked at the death of his client and were grieving.

Marcia Horowitz, a spokeswoman for the Picower family, said today that Picower had a number of heart related medical issues, as well as Parkinson's disease.