(AP) - An attorney says Robert F. Kennedy Jr.'s estranged wife has been found dead in New York.

Kerry Lawrence says Mary Kennedy died on Wednesday. He says he doesn't know the cause of her death.

Police confirm a body was found on Robert F. Kennedy Jr.'s property in Bedford, north of New York City.

Lawrence had represented Mary Kennedy in a drunken-driving case.

Robert Kennedy Jr. is a prominent environmental lawyer. He's the son of Sen. Robert F. Kennedy and nephew of President John F. Kennedy, both assassinated in the 1960s. Mary Kennedy was his second wife. They had four children.