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Mary Kennedy died from hanging - autopsy

Robert Kennedy Jr. and wife Mary Richardson Kennedy arrive at the NRDC'S benefit for Natural Defense Council, May 6, 2004, in Los Angeles. (Frank Trapper/Corbis)

May 17, 2012 12:00:00 AM PDT
An autopsy on the body of Mary Richardson Kennedy determined that the estranged wife of Robert Kennedy Jr. died in a hanging.

According to the Westchester County Medical Examiner's Office, the cause of death was asphyxiation due to hanging.

Mary Richardson Kennedy was found dead Wednesday on family property. She was Robert F. Kennedy Jr.'s second wife.

Mary Richardson Kennedy had trouble with drugs and alcohol, and had two high-profile arrests around the time her husband filed for divorce in 2010. The divorce was never finalized.

She pleaded guilty to drunken driving later that year when police reported her seeing her car hit a curb outside a school near her home.