William Calley Jr, convicted for My Lai massacre in Vietnam, dies aged 80 US army lieutenant was only person convicted for role in 1968 massacre of hundreds of Vietnamese civilians. William Calley Jr, the only United States soldier convicted for his role in the Vietnam War’s My Lai massacre of hundreds of Vietnamese civilians, has died, according to US media reports. He was 80.. Calley died on April 28 at a hospice centre in Gainesville, Florida, The Washington Post first reported, citing his death certificate. More details of his death were not immediately available.. ACCORDING TO ANOTHER SOURCE: William L. Calley Jr., a junior Army officer who became the only person convicted in connection with the My Lai Massacre of 1968, when U.S. soldiers slaughtered hundreds of unarmed South Vietnamese men, women and children in one of the darkest chapters in American military history, died April 28 at a hospice center in Gainesville, Fla. He was 80. The Washington Post obtained a copy of his dea