Jim Marrs was born in Fort Worth, Texas, on 5th December 5, 1943. His father, a strict Baptist, sold structural steel for a company in St. Louis. Marrs began working as a journalist while at junior high school. After graduating from University of North Texas in 1966 he attended Graduate School at Texas Tech in Lubbock.
After graduating from University of North Texas he joined the United States Army. On his release in 1968 he joined the Fort Worth Star-Telegram. He served as police reporter and general assignments reporter covering stories locally, in Europe and 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.
Marrs began to take an interest in the assassination of John F. Kennedy. After interviewing several members of the Dallas Police Department he became convinced him that the Warren Commission was a cover-up. Marrs continued to investigate the case and interviewed several important witnesses as well as city and county officials.
In 1976 Marrs began teaching a course about the assassination for the University of Texas at Arlington. He left the Fort Worth Star-Telegram in 1980 and worked as a freelance journalist while continuing to investigate the death of Kennedy. Marrs eventually became convinced that Lee Harvey Oswald had been set up by the government and in 1989 he published Crossfire: The Plot That Killed Kennedy. Published to critical acclaim and reached the New York Times Paperback Non-Fiction Best Seller list in mid-February 1992. It also became a basis for the Oliver Stone film JFK and he served as a chief consultant for both the film's screenplay and production.
Since 1980, Mr. Marrs has been a freelance writer, author and public relations consultant. He also published a rural weekly newspaper along with a monthly tourism tabloid, a cable television show and several videos.
Beginning in 1992, Mr. Marrs spent three years researching and completing a non-fiction book on a top-secret government program involving the psychic phenomenon known as remote viewing only to have it mysteriously canceled as it was going to press in the summer of 1995. Within two months, the story of military-developed remote viewing broke nationally in the Washington Post after the CIA held a press conference revealing the program but putting their own spin on psychic studies. Psi Spies is now available from JimMarrs.com.
In May, 1997, Marrs' in-depth investigation of UFOs, Alien Agenda, was published by HarperCollins. Marrs has been a featured speaker at a number of national conferences including the Annual International UFO Congress and the Annual Gulf Breeze UFO Conference. Publisher's Weekly described the book as "the most entertaining and complete overview of flying saucers and their crew in years." The paperback edition was released in mid-1998 and has since become the best-selling UFO book ever in the United States. Beginning in 2000, he began teaching a course on UFOs at the University of Texas at Arlington.
In early 2000, HarperCollins published Rule by Secrecy, which traced the hidden history that connects modern secret societies to the Ancient Mysteries. In 2003, his book The War on Freedom probed the conspiracies of the 9/11 attacks and their aftermath.
Other books by Jim Marrs includes Inside Job: Unmasking the 9/11 Conspiracies (2004), Terror Conspiracy, The: Provocation, Deception and 9/11 (2006) and Rise of the Fourth Reich (2008)