Question: How was the man investigated by Keith Beauchamp killed?

Context paragraphs:
Keith Beauchamp (filmmaker): Keith Beauchamp (born 1972) is a filmmaker based in Brooklyn who investigated the murder of Emmett Till, fifty years after Till's death in 1955, Beauchamp's research eventually led him to create the documentary film "The Untold Story of Emmett Louis Till" , and the reopening of the case by the United States Department of Justice in May 2004.

Dickson (surname): Dickson or, as is common in England, "Dixon," is a patronymic surname, traditionally Scottish and thought to have originated upon the birth of the son of Richard Keith, son of Hervey de Keith, Earl Marischal of Scotland, and Margaret, daughter of the 3rd Lord of Douglas.  "Nisbet in his Heraldry (Edinburgh 1722) says 'The Dicksons are descendants from Richard Keith, said to be a son of the family of Keith, Earls Marischals of Scotland' and in proof thereof carry the chief of Keith Marischal.  This Richard was commonly called Dick and the 'son' was styled after him.  The affix of son in the Lowlands answering the prefix Mac in the Highlands."  As a result, Clan Dickson is considered a sept of Clan Keith.  Richard Keith's son, Thomas, took the surname "Dickson," meaning "Dick's son" or "Richard's son."  Thomas Dickson (1247–1307) himself has quite a history.  He was associated in some way with William Wallace, and was killed by the English in 1307 in battle.  Tradition states he was slashed across the abdomen but continued fight holding the abdominal wound closed with one hand until he finally dropped dead.  He is buried in the churchyard of St Brides, Douglas, and his marker shows him with a sword in one hand holding his belly with the other.  Robert the Bruce made him Castellan of Castle Douglas the year before he was killed.

Emmett Till: Emmett Louis Till (July 25, 1941 – August 28, 1955) was a 14-year-old African-American who was lynched in Mississippi in 1955, after a white woman said she was offended by him in her family's grocery store.  The brutality of his murder and the fact that his killers were acquitted drew attention to the long history of violent persecution of African Americans in the United States.  Till posthumously became an icon of the Civil Rights Movement.

Forrest River massacre: The Forrest River massacre, or Oombulgurri massacre, is a disputed account of a massacre of Indigenous Australian people by a law enforcement party in the wake of the killing of a pastoralist, which took place in the Kimberley region of Western Australia in 1926.  The massacre was investigated by a Royal Commission in 1927 which subsequently determined that 11 people had been killed.  Charges were brought against two officers but dismissed for lack of evidence.  A local man, Lumbia, was convicted of the killing of the pastoralist Frederick Hay.  The findings have recently been disputed by journalist Rod Moran, whose analysis has received some academic support while other academic historians accept that a massacre did take place but disagree over the number of victims.

Rogaciano Alba: Rogaciano Alba Alvarez (Rogaciano Alba) is the current head of Guerrero's cattle ranching union (Guerrero cattlemen's association).  He was mayor of Petatlan and is a rancher.  In 2002 he was investigated for involvement in the murder of Digna Ochoa, a human rights lawyer, Zapatista supporter and anti-logging activist.  He was also accused of involvement in the murder of Merejildo Torres.  On May 4, 2008 his home was attacked by forty gunmen.  His two sons, Alejandro and Rusbel, were killed, his daughter kidnapped and at least seven other people killed.

Killing of Abdisamad Sheikh-Hussein: Abdisamad "Adam" Sheikh-Hussein was a 15-year-old boy who was killed on December 4, 2014 in Kansas City, Missouri.  He was a student at Staley High School.  He was a Muslim and had immigrated to the United States from Somalia with his family.  As he walked near the Kansas City Somali Center, a man intentionally rammed his car into him, knocking him into the air, and then ran over him, nearly severing his legs.  He died in the hospital.  The FBI investigated the incident as an anti-Muslim hate crime.

2016 Ohio machete attack: On February 11, 2016, Mohamed Barry entered the Nazareth Restaurant in Columbus, Ohio and began to attack customers with a machete, injuring four.  Barry, who was killed as he attempted to attack police officers with his machete, had been investigated by the Federal Bureau of Investigation (FBI) four years prior for making radical statements.  The attack is being investigated as a possible instance of lone-wolf terrorism.

The Troubles in Magherafelt: A total of eleven people were killed in violence relating to the Northern Irish Troubles in the town of Magherafelt, County Londonderry.  Nine were killed by the Irish Republican Army (IRA), including three IRA members killed by the premature explosion of their own bomb while travelling through Magherafelt.  One was killed by a non-specific republican group and another by the opposing Ulster Freedom Fighters (UFF).  Of the others killed by the IRA, four were Protestant civilians.  Three of them were killed in two separate car bomb explosions.  The fourth Protestant civilian was shot because his firm was a contractor for the British Army and the Royal Ulster Constabulary (RUC).  The IRA's other two victims were both Protestant members of the security forces, one from the RUC and the other from the Ulster Defence Regiment.  Both were off duty when killed.  The man killed by the UFF was a Sinn Féin councillor who was shot in his workplace.  The man killed by the non-specific republican group was a Catholic civilian.

Keith Beauchamp (rugby league): Keith Beauchamp (born December 20, 1967) was a rugby league footballer of the 1990s.

Face Oculta: Face Oculta (Hidden Face) is a Portuguese nationwide political corruption, money-laundering and corporate tax evasion scandal, first noticed in October 2009.  The "Polícia Judiciária" investigated the business group headed by Manuel Godinho, suspected of economic crimes and bribery of managers of public funds.  All Godinho’s companies, many of which were linked to business waste and waste management, are based in the Aveiro District.  Godinho was arrested on October 28, 2009, in Aveiro, in relation to economic crimes involving an oxygen-treatment and environmental cleaning group.  By early November, 14 people had been indicted.  Several companies' employees were investigated, among them those of Petrogal and Portucel Soporcel.  Also investigated were GNR officers, town hall civil servants (most notoriously from the Gouveia Municipality), businesspersons (most prominently Manuel Godinho and his right-hand man, Namércio Cunha, a formal suspect and alleged liaison between Godinho and REN, the company led by José Penedos), and former politicians - noted examples include Armando Vara (Millennium bcp) and José Penedos (REN).  Former politician Armando Vara is reported by the police investigation to have had suspicious phone calls with the then Portuguese Prime Minister José Sócrates.  These phone calls were recorded by the investigators.  Sócrates denied any involvement, claiming he was only talking to a friend.

Supporting paragraphs: Keith Beauchamp (filmmaker) Emmett Till
Answer: lynched