Question: Who was the only reporter present when the visible spokesperson and leader in the Civil Rights Movement was assassinated?

full_context: Document 1: Martin Luther King Jr. National Historic Site: The Martin Luther King Jr. National Historic Site consists of several buildings including Martin Luther King Jr.'s boyhood home and the original Ebenezer Baptist Church, the church where King was baptized and both his father Martin Luther King Sr. and he were pastors. These places, critical to the interpretation of the life of Martin Luther King Jr. and his legacy as a leader of the American Civil Rights Movement, were included in the National Historic Site when it was established on October 10, 1980.
Document 2: Eldridge Cleaver: Leroy Eldridge Cleaver (August 31, 1935 – May 1, 1998) was an American writer and political activist who became an early leader of the Black Panther Party. His 1968 book, "Soul On Ice", is a collection of essays that, at the time of its publication, was praised by "The New York Times Book Review" as "brilliant and revealing". In the most controversial part of the book, Cleaver acknowledges committing many acts of rape.
Document 3: James Bevel: James Luther Bevel (October 19, 1936 – December 19, 2008) was a minister and leader of the Civil Rights Movement in the United States. As the Director of Direct Action and of Nonviolent Education of the Southern Christian Leadership Conference (SCLC), he initiated, strategized, directed, and developed SCLC's three major successes of the era: the 1963 Birmingham Children's Crusade, the 1965 Selma voting rights movement, and the 1966 Chicago open housing movement. He suggested that SCLC call for and join a March on Washington in 1963. Bevel later strategized the 1965 Selma to Montgomery marches, which contributed to Congressional passage of the 1965 Voting Rights Act.
Document 4: Martin Luther King Jr.: Martin Luther King Jr. (born Michael King Jr., January 15, 1929 – April 4, 1968) was an American Baptist minister and activist who became the most visible spokesperson and leader in the Civil Rights Movement. He is best known for his role in the advancement of civil rights using the tactics of nonviolence and civil disobedience based on his Christian beliefs and inspired by the nonviolent activism of Mahatma Gandhi.
Document 5: Jack Kershaw: John Karl "Jack" Kershaw (October 12, 1913 – September 7, 2010) was an American attorney best known for challenging the official account of the assassination of Martin Luther King, Jr., claiming that his client James Earl Ray was an unwitting participant in a ploy devised by a mystery man named Raul to kill the civil rights leader. Kershaw was also a Southern secessionist and segregationist who helped found the League of the South. In 1998, he sculpted a Nathan Bedford Forrest Statue that has drawn wide criticism and mocking by national media.
Document 6: King Center for Nonviolent Social Change: The Martin Luther King Jr. Center for Nonviolent Social Change is a nongovernmental, not-for-profit organization founded in 1968 by Coretta Scott King. King started the organization in the basement of the couple's home in the year following the 1968 assassination of her husband, Martin Luther King Jr.
Document 7: Eldridge Cleaver, Black Panther: Eldridge Cleaver, Black Panther is an Algerian documentary film made in 1969, in which Black Panther activist Eldridge Cleaver speaks from exile in Algeria, where he had moved after the state of California tried to charge him with intent to murder. In the documentary, Cleaver discusses revolution in the United States and speaks against such political enemies as Richard Nixon, Spiro Agnew, Ronald Reagan and Richard J. Daley.
Document 8: Eric Black (writer): Eric Black is an American journalist. He was a longtime reporter for the Minnesota Star Tribune newspaper, and has also been a Twin Cities blogger. He is a columnist for online newspaper MinnPost, primarily writing about politics and the historical background of current issues.
Document 9: C. T. Vivian: Cordy Tindell Vivian, usually known as C. T. Vivian (born July 30, 1924), is a minister, author, and was a close friend and lieutenant of Martin Luther King Jr. during the Civil Rights Movement. Vivian continues to reside in Atlanta, Georgia and most recently founded the C. T. Vivian Leadership Institute, Inc. He is a member of the Alpha Phi Alpha fraternity.
Document 10: Joseph Sullivan (FBI): Joseph Aloysius Sullivan (February 17, 1917 – August 2, 2002) was a Major Case Inspector for the Federal Bureau of Investigation. Born in Montreal, Wisconsin, he grew up in Hurley, Wisconsin. He was involved in a number of highly publicized cases in the sixties and seventies including the assassination of Martin Luther King Jr., the murder of United Mine Workers reformer Joseph "Jock" Yablonski, the Sterling Hall bombing at the University of Wisconsin–Madison, and the Kent State shootings. Despite his involvement in such high-profile cases, Sullivan is best known for his relentless search to track down the killers of three civil rights workers, who were brutally slain in Mississippi in 1964. The character played by Willem Dafoe in the movie "Mississippi Burning" is loosely based on Sullivan. According to "The FBI - A Comprehensive Referecie Guide" (1998), edited by Athan G. Theoharis, Sullivan was also the model for Inspector Lew Erskine, the lead character played by Efrem Zimbalist, Jr., on the TV series "The FBI".
Document 11: Martin Luther King Jr.: Martin Luther King Jr. (born Michael King Jr., January 15, 1929 – April 4, 1968) was an American Baptist minister and activist who became the most visible spokesperson and leader in the Civil Rights Movement. He is best known for his role in the advancement of civil rights using the tactics of nonviolence and civil disobedience based on his Christian beliefs and inspired by the nonviolent activism of Mahatma Gandhi.
Document 12: List of artistic depictions of Mahatma Gandhi: Mohandas Karamchand Gandhi was a major political and spiritual leader of India and the Indian independence movement. He was the pioneer of "Satyagraha" — the resistance of alleged tyranny through mass civil disobedience, firmly founded upon "ahimsa" or total nonviolence — which inspired movements for civil rights and freedom across the world. Gandhi is commonly known in India and across the world with the honorific "Mahatma Gandhi" (Sanskrit: महात्मा "mahātmā" — "Great Soul") and as "Bapu" (Gujarati: બાપુ "bāpu" — "Father"). In India, he is recognised as the Father of the Nation by the political class and 2 October, his birthday, is commemorated each year on Gandhi Jayanti, a national holiday and dry day.
Document 13: Nat Caldwell: Nathan Green "Nat" Caldwell (July 16, 1912 – February 11, 1985) was an American journalist who spent fifty years on the staff of the "Nashville Tennessean". He was a co-winner of the Pulitzer Prize for National Reporting in 1962.
Document 14: Earl Caldwell (journalist): Earl Caldwell (born c. 1935) is an American journalist. He documented the Black Panthers from the inside in the 1970s, and became embroiled in a key U.S. Supreme Court decision clarifying reporters' rights. The case started when the FBI tried to press Caldwell to be an informant against the Black Panther Party. He worked for "The New York Times", "New York Daily News", "The New York Amsterdam News" and is currently on the radio in New York City. His career as a journalist spans more than four decades. He witnessed and chronicled some of the most important civil rights events from the 1960s onwards and was the only reporter present when Martin Luther King Jr. was assassinated. Caldwell is a founding member of the steering committee of the Maynard Institute for Journalism Education, as well as the Washington-based Reporters Committee for Freedom of the Press. In 2009 he was inducted into the National Association of Black Journalists Hall of Fame.
Document 15: Mahatma Gandhi: Mahātmā Mohandas Karamchand Gandhi ( ; ] ; 2 October 1869 – 30 January 1948) was the leader of the Indian independence movement against British rule. Employing nonviolent civil disobedience, Gandhi led India to independence and inspired movements for civil rights and freedom across the world. The honorific Mahātmā (Sanskrit: "high-souled", "venerable")—applied to him first in 1914 in South Africa—is now used worldwide. In India, he is also called Bapu ji (Gujarati: endearment for "father", "papa") and Gandhi ji. He is unofficially called the "Father of the Nation"
ground_truth: Earl Caldwell