Question: Who was found guilty of killing 22 villagers and originally given a life sentence but was released after a ruling by federal judge found their trial has been prejudiced by pre-trail publicity?

full_context: Document 1: Chelsea Manning: Chelsea Elizabeth Manning (born Bradley Edward Manning, December 17, 1987) is a former United States Army soldier who was convicted by court-martial in July 2013, of violations of the Espionage Act and other offenses, after disclosing to WikiLeaks nearly 750,000 classified, or unclassified but sensitive, military and diplomatic documents.
Document 2: My Lai (film): My Lai is a documentary film created by PBS; it aired as an episode of" American Experience." The documentary details the 1968 My Lai Massacre and its background. Topics of the video include the men of Charlie Company and the cover-up of the event. Hugh Thompson, Jr. (the rescue helicopter pilot who confronted the ground forces personally, reported the killings, and helped halt the massacre) is also covered in the documentary.
Document 3: James Hawkins (United States Army officer): James Hawkins, from Maysville, Kentucky, was a Battlefield commissioned Second lieutenant and field operations leader of the United States Army Tiger Force commando unit, 1st Battalion (Airborne), 327th Infantry Regiment, 1st Brigade (Separate), 101st Airborne Division, during the Vietnam War. The unit was featured in the Pulitzer Prize winning book "," written by "Toledo Blade" reporters Michael D. Sallah and Mitch Weiss (the Pulitzer Prize included a third "Blade" reporter Joe Mahr). The U.S. Army Criminal Investigation Command investigated the Tiger Force for "atrocities," including torture, maiming, rape, and murder of unarmed villagers, including babies, children, and the elderly, during operations in the Song Ve Valley. The Army did not file charges against Tiger Force soldiers, including their acting platoon leader, Hawkins. The investigations into the atrocities committed by Tiger Force occurred after reports and investigations into atrocities by United States Army soldiers in the My Lai Massacre. Hawkins attributes the lack of charges to the timing of the investigation after My Lai and the potential for additional bad "publicity."
Document 4: Manila massacre: The Manila massacre involved atrocities committed against Filipino civilians in the City of Manila, the capital of the Philippines by Japanese troops during World War II at the Battle of Manila in 1945. The Manila massacre was one of several major war crimes committed by the Imperial Japanese Army, as judged by the postwar military tribunal. The Japanese commanding general, Tomoyuki Yamashita, and his chief of staff Akira Mutō, were held responsible for the massacre and other war crimes in a trial in late 1945 in Manila. Yamashita was executed on 23 February 1946 and Mutō on 23 December 1948.
Document 5: Charles Manson: Charles Milles Manson (born Charles Milles Maddox, November 12, 1934) is an American convicted mass murderer and former cult leader who led what became known as the Manson Family, a quasi-commune that arose in California in the late 1960s. Manson's followers committed a series of nine murders at four locations in July and August 1969. In 1971 he was found guilty of first-degree murder and conspiracy to commit murder for the deaths of seven people – most notably of the actress Sharon Tate – all of which were carried out by members of the group at his instruction. Manson also received first-degree murder convictions for two other deaths. Manson was originally sentenced to death, but his sentence was commuted to life imprisonment when California invalidated the state's death penalty statute in 1972. He is currently serving multiple life sentences at California State Prison in Corcoran.
Document 6: Charles B. McVay III: Charles B. McVay III (July 30, 1898 – November 6, 1968) was an American naval officer and the commanding officer of  when it was lost in action in 1945, resulting in a massive loss of life. Of all captains in the history of the United States Navy, he is the only one to have been subjected to court-martial for losing a ship sunk by an act of war, despite the fact that he was on a top secret mission maintaining radio silence (the testimony of the Japanese commander who sank his ship also seemed to exonerate McVay). After years of mental health problems, he committed suicide. Following years of efforts by some survivors and others to clear his name, McVay was posthumously exonerated by the 106th United States Congress and President Bill Clinton on October 30, 2000.
Document 7: My Lai Massacre: The Mỹ Lai Massacre (Vietnamese: "Thảm sát Mỹ Lai" , ] ; , , or ) was the Vietnam War mass killing of between 347 and 504 unarmed civilians in South Vietnam on March 16, 1968. It was committed by U.S. Army soldiers from Company C, 1st Battalion, 20th Infantry Regiment, 11th Brigade, 23rd (Americal) Infantry Division. Victims included men, women, children, and infants. Some of the women were gang-raped and their bodies mutilated. Twenty-six soldiers were charged with criminal offenses, but only Lieutenant William Calley Jr., a platoon leader in C Company, was convicted. Found guilty of killing 22 villagers, he was originally given a life sentence, but served only three and a half years under house arrest.
Document 8: Leslie Van Houten: Leslie Louise Van Houten (born August 23, 1949) is an American murderer serving a life sentence in relation to the 1969 killings of Leno and Rosemary LaBianca, when Van Houten was 19 years old. She was arrested weeks later, and convicted at the main Charles Manson trial in 1971, at which she repeatedly sabotaged her own defense, and tried to exculpate Manson. She was convicted and became the youngest woman ever sentenced to death in California. However, executions were halted in the state in 1972 after the California Supreme Court ruled that the death penalty was unconstitutional in "The People of the State of California v. Robert Page Anderson", 493 P.2d 880, 6 Cal. 3d 628 (Cal. 1972). She was granted a new trial at which her defense to the charge of first degree murder was diminished responsibility, but the jury could not agree on a verdict. At a third trial, she was convicted and sentenced to life in prison, although with a possibility of parole. In relation to her case, high courts, parole boards, and the state governor have said that an inexplicable or racial motive for murder could merit exemplary punishment and outweigh any evidence of subsequent reform.
Document 9: Charles Graner: Charles A. Graner, Jr., (born 1968) is a former member of the U.S. Army reserve who was convicted of prisoner abuse in connection with the 2003–2004 Abu Ghraib prisoner abuse scandal. Graner, with other soldiers from his unit, the 372nd Military Police Company, was accused of allowing and inflicting sexual, physical, and psychological abuse of Iraqi prisoners of war in Abu Ghraib Prison, a notorious prison in Baghdad during the United States' occupation of Iraq.
Document 10: William Calley: William Laws Calley Jr. (born June 8, 1943) is a former United States Army officer convicted by court-martial of murdering 22 unarmed South Vietnamese civilians in the My Lai Massacre on March 16, 1968, during the Vietnam War. While not technically exonerated, after three and a half years of house arrest, Calley was released after a ruling by federal judge J. Robert Elliott who found that Calley's trial had been prejudiced by pre-trial publicity, denial of subpoenas of certain defense witnesses, refusal of the United States House of Representatives to release testimony taken in executive session of its My Lai investigation, and inadequate notice of the charges. His initial conviction faced widespread public opposition both due to the campaign circumstances of civilian embedded Viet Cong, and due to Calley being singled out as the sole convicted officer in relation to the massacre.
Document 11: Winter Soldier Investigation: The "Winter Soldier Investigation" was a media event sponsored by the Vietnam Veterans Against the War (VVAW) from January 31, 1971, to February 2, 1971. It was intended to publicize war crimes and atrocities by the United States Armed Forces and their allies in the Vietnam War. The VVAW challenged the morality and conduct of the war by showing the direct relationship between military policies and war crimes in Vietnam. The three-day gathering of 109 veterans and 16 civilians took place in Detroit, Michigan. Discharged servicemen from each branch of military service, as well as civilian contractors, medical personnel and academics, all gave testimony about war crimes they had committed or witnessed during the years 1963–1970.
Document 12: Ronald Gray: Ronald Adrin Gray (born August 14, 1965) is an American spree killer whose convictions include four counts of murder, one count of attempted murder and eight counts of rape. His crimes were committed when he was in the United States Army, stationed at Fort Bragg, North Carolina. He was tried and convicted by military courts, and was sentenced to be put to death. His execution by lethal injection would be the first performed by the United States military since the execution of John A. Bennett for rape and attempted murder in 1961. On November 26, 2008, a federal judge issued a stay of execution stopping the planned December 10 execution. On January 26, 2012, the Army Court of Criminal Appeals denied relief in Gray's case. Gray's lawyers plan to appeal to the Court of Appeals for the Armed Forces.
Document 13: Bagram torture and prisoner abuse: In 2005, "The New York Times" obtained a 2,000-page United States Army investigatory report concerning the homicides of two unarmed civilian Afghan prisoners by U.S. military personnel in December 2002 at the Bagram Theater Internment Facility (also "Bagram Collection Point" or "B.C.P.") in Bagram, Afghanistan and general treatment of prisoners. The two prisoners, Habibullah and Dilawar, were repeatedly chained to the ceiling and beaten, resulting in their deaths. Military coroners ruled that both the prisoners' deaths were homicides. Autopsies revealed severe trauma to both prisoners' legs, describing the trauma as comparable to being run over by a bus. Seven soldiers were charged in 2005.
Document 14: Ernest Medina: Ernest Lou Medina (born August 27, 1936) is a former captain of infantry in the United States Army. He served during the Vietnam War and was acquitted in a court-martial of war crimes charges in 1971. He was the commanding officer of Company C, 1st Battalion, 20th Infantry of the 11th Brigade, Americal Division, the unit responsible for the My Lai Massacre of 16 March 1968. He was court martialed in 1971 for his role in the My Lai Massacre, but acquitted the same year.
Document 15: William Westmoreland: William Childs Westmoreland (March 26, 1914 – July 18, 2005) was a United States Army general, who most notably commanded U.S. forces during the Vietnam War from 1964 to 1968. He served as Chief of Staff of the United States Army from 1968 to 1972.
ground_truth: William Calley