Source: The New York Times
http://www.nytimes.com/2004/09/14/politics/14inquiry.html
On September 14, 2004 The New York Times reported, "the Justice Department has opened dual internal investigations into the department's arrest of a Muslim lawyer in Oregon who was mistakenly linked to the Madrid train bombings because fingerprints found at the scene of that terrorist attack were misread, officials said Monday. The lawyer, Brandon Mayfield, said in a complaint that the Justice Department and the Federal Bureau of Investigation had inappropriately conducted a secret search of his home and jailed him for two weeks in May in part because of his Muslim faith and his ties to Muslims in Oregon. He was released after the federal authorities said they had mistakenly matched Mr. Mayfield's fingerprints to a print found on a bag that contained detonators at the crime scene in Madrid."