 He was given a life sentence by a court-martial in 1970, but after numerous appeals, he was finally set free; he had served just over three years of house arrest.Although My Lai generated a lot of civilian recriminations and bad publicity for the military, it was not the only massacre.The Vietnam War Crimes Working Group Files made public in 1994 by the "Freedom of Information Act" reveals seven, albeit much smaller, massacres previously unacknowledged by the Pentagon, in which at least 137 civilians had died.