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. (See Who's Who in the World, Millennium Edition, New Providence, NJ; Marquis, 1999, p. 1364)

Since 1980, Marrs has been a free-lance writer, author, and public relations consultant. He has also published a rural weekly newspaper along with a monthly tourism tabloid, a cable television show, and several videos.(Who's Who, Ibid.)

Since 1976, Marrs has taught a course on the assassination of President John F. Kennedy at the University of Texas at Arlington. In 1989, his book, Crossfire: The Plot That Killed Kennedy, was published and reached the New York Times Paperback Non-Fiction Best Seller list in mid-February 1992. It became a basis for the Oliver Stone film JFK. Marrs served as a chief consultant for both the film's screenplay and production.(Who's Who, Ibid.)

Edward Flaherty, a professor of economics at the College of Charleston in South Carolina, wrote an essay entitled Debunking the Federal Reserve Conspiracy Theories, in which he argues that Executive Order 11110 is quite infamous among conspiracy theorists such as Marrs, who believe President Kennedy was killed by the men who have control over the Federal Reserve Board, based on arguments that can be contradicted using CRS Report for Congress, No. 96-672 E.

Beginning in 1992, Marrs spent three years researching and completing a non-fiction book on a top-secret government program called the Stargate Project involving the psychic phenomenon known as remote viewing, only to have the program 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 revealed the program.(Who's Who, Ibid.)

In May 1997, Marrs' investigation of UFOs, Alien Agenda, was published by HarperCollins Publishers. Publishers Weekly described Alien Agenda as "the most entertaining and complete overview of flying saucers and their crew in years". The paperback edition was released in mid-1998. It has been translated into several foreign languages and become the top-selling UFO book in the world.(Who's Who, Ibid.)

In early 2000, HarperCollins published Rule by Secrecy, which claimed to trace a hidden history connecting modern secret societies to ancient and medieval times. This book also reached the New York Times Best Seller list. In 2003, his book The War on Freedom probed the alleged conspiracies of the 9/11 attacks and their aftermath. It was released in 2006 under the title The Terror Conspiracy.(Who's Who, Ibid.)

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, but he also speaks at local conferences, such as Conspiracy Con and The Bay Area UFO Expo. Beginning in 2000, he began teaching a course on UFOs at the University of Texas at Arlington.(Who's Who, Ibid.)

Marrs has appeared on ABC, NBC, CBS, CNN, C-SPAN, The Discovery Channel, TLC, The History Channel, This Morning America, Geraldo, The Montel Williams Show, Today, TechTV, Larry King (with George Noory), and Art Bell radio programs, as well as numerous national and regional radio and TV shows.(Who's Who, Ibid.)

Books

• ISBN 978-0-061970-68-9 The Trillion-Dollar Conspiracy: How the New World Order, Man-Made Diseases, and Zombie Banks Are Destroying America (Hardcover, June 2010)
• ISBN 978-1-934708-29-3 The Sisterhood of the Rose (Hardcover, November 2009)
• ISBN 978-1-934708-09-5 Above Top Secret (paperback, October 2008)
• ISBN 978-0-06-124558-9 The Rise of the Fourth Reich: The Secret Societies That Threaten to Take Over America (hardcover, June 2008)
• ISBN 978-1-93-285743-6 The Terror Conspiracy: Deception, 9/11 and the Loss of Liberty (paperback, 2006) (An expanded and updated version of "The War On Freedom")
• ISBN 978-1-57-983013-7 Inside Job: Unmasking the 9/11 Conspiracies (paperback, 2004) (the first section of "The War On Freedom" plus some appendices not included in other books)
• ISBN 978-0-97-271311-5 The War On Freedom (paperback, 2003)
• ISBN 978-0-97-271310-8 Psi Spies (paperback, 2002)
• ISBN 978-0-06-093184-1 Rule by Secrecy: The Hidden History That Connects the Trilateral Commission, the Freemasons, and the Great Pyramids (paperback, 2001)
• ISBN 978-0-06-095536-6 Alien Agenda: Investigating the Extraterrestrial Presence Among Us (paperback, 2000)
• ISBN 978-0-88-184648-5 Crossfire: The Plot That Killed Kennedy (paperback, 1993) (#5 New York Times non-fiction paperback bestseller, February 1992)

Videos

• Safespace - Fastwalkers - Winter 2006

Audio

CDs

• 16 Questions

Radio Interviews

• Binnall of America - Part 1 and Part 2 - September 17, 2005
• Binnall of America - Part 1 and Part 2 - September 10, 2005