William L. Calley Jr., who as a young Army lieutenant during the Vietnam War was the only American convicted in the murder of hundreds of unarmed, unresisting Vietnamese civilians in the atrocity known as the My Lai Massacre, died on April 28 in hospice in Gainesville, Fla, according to Social Security Administration records. The cause of his death is not publicly available. Family members of Lieutenant Calley did not immediately respond to requests for additional information. His death was first reported by The Washington Post. His death record was found through data shared from the Social Security Death Master File to Lexis Nexis.

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Persons: William L, Calley Jr, Calley, Lai, Mee Lye Organizations: Social Security Administration, The Washington Post, Social, Lexis Nexis Locations: Vietnam, Gainesville, Fla