Jim Marrs (born 5 December 1943) is an American former newspaper journalist and New York Times best-selling author of books and articles on a wide range of alleged cover ups and conspiracies. Marrs is a prominent figure in the JFK conspiracy press and his book Crossfire was a source for Oliver Stone's film JFK. He has written books asserting the existence of government conspiracies regarding aliens, 9/11, telepathy, and secret societies. He was once a news reporter in the Dallas–Fort Worth Metroplex and has taught a class on the Kennedy Assassination at University of Texas at Arlington for 30 years. Marrs is a member of the Scholars for 9/11 Truth.

A native of Fort Worth, Texas, Marrs earned a Bachelor of Arts degree in journalism from the University of North Texas in 1966 and attended graduate school at Texas Tech in Lubbock for two years more. He has worked for several Texas newspapers, including the Fort Worth Star-Telegram, where, beginning in 1968, he served as police reporter and general assignments reporter covering stories locally, in Europe, and in the Middle East. After a leave of absence to serve with a Fourth Army intelligence unit during the Vietnam War, he became military and aerospace writer for the newspaper and an investigative reporter.

Lee Harvey Oswald (October 18, 1939 – November 24, 1963) was, according to four government investigations, the sniper who assassinated John F. Kennedy, the 35th President of the United States, in Dallas, Texas, on November 22, 1963.

A former U.S. Marine who had briefly (October 1959 – June 1962) defected to the Soviet Union, Oswald was initially arrested for the murder of police officer J. D. Tippit, on a Dallas street approximately 40 minutes after Kennedy was shot. Suspected in the assassination of Kennedy as well, Oswald denied involvement in either of the killings. Two days later, while being transferred from police headquarters to the county jail, Oswald was shot and killed by nightclub owner Jack Ruby in full view of television cameras broadcasting live.

In 1964, the Warren Commission concluded that Oswald acted alone in assassinating Kennedy, firing three shots, a conclusion also reached by prior investigations carried out by the FBI and Dallas Police Department. In 1979, the House Select Committee on Assassinations concluded that Oswald fired the shots which killed Kennedy, but differed from previous investigations in concluding he 'probably' did not act alone. The evidence used to form this conclusion has since been disputed.

David Adie Whitehead CBE, DSO & Bar, MC (30 September 1896 – 23 October 1992) was an Australian Army officer who fought in both World War I and World War II and rose to the rank of brigadier.

David Whitehead enlisted in the Australian Army as a cadet lieutenant on 1 September 1913. He received officer training at Royal Military College, Duntroon in Canberra and was commissioned as an officer on 4 April 1916. Upon graduation Whitehead was seconded to the Australian Imperial Force (AIF) in France where he commanded the 23rd Machine Gun Company from April 1917 until he was made adjutant of the 3rd Machine Gun Battalion in July 1918. He was awarded the Military Cross in September 1918 for leading a battery of eight machine guns under heavy fire during an attack in late August.

Whitehead left the full-time Army after returning to Australia in 1919, but continued to serve in the part-time Citizens Military Forces (CMF). He held a number of regimental positions, and was promoted to lieutenant-colonel and command of the 1st Machine Gun Regiment in October 1937.