Brandon Mayfield (born July 15, 1966) is an American in Washington County, Oregon, who was accused of being the bomber in the 2004 Madrid train bombings.
On May 6, 2004, the FBI arrested Mayfield as a material witness in connection with the Madrid attacks, and held him for over two weeks.
Mayfield was not charged, and an FBI internal review later acknowledged serious errors in their investigation.
Ensuing lawsuits have resulted in a formal apology from the U.S.
government and a $2 million settlement.
An initial ruling declared some provisions of the USA PATRIOT Act unconstitutional, but the United States government appealed, and the ruling was overturned.
Mayfield's case has been referenced in numerous scientific, political, and social journals.