On 6th May 2004 US Citizen Brandon Mayfield was arrested by the FBI as the primary suspect responsible for the the Madrid Bombings. The detention was based on a single, imperfect finger print, which the FBI did not see the original of, despite being given the opportunity by the Spanish police. Brandon was released on 21st May 2004, two days after the Spanish police had identified the correct suspect, Ouhane Daoud.
On the 13th March 2004 when the FBI first searched their database “AFIS” – Automatic Fingerprint Identification Search”, the result was negative, and they asked for a new, better quality image, which they received on the following day, on 14th March.
On 15th March 2004, 20 “matches” were found during the search – 20 were found as the search was programmed to limit it do 20 – i.e it could/would have many more, if it had not been limited to 20 people.
Brandon Mayfield was ranked number 4 on the search. However details of the 20 people identified in the search were extracted and background checks made. Brandon Mayfield has the following Bio:
American citizen born in Oregon and reared in Kansas. He lives with his wife and three children in Aloha, Oregon, a suburb of Portland. Mayfield was 38 years old, a former Army officer with an honorable discharge, and a practicing Oregon lawyer. However his faith is listed as Muslim.
On April 13, 2004, the Spanish National Police provided a written report to the FBI concluding that Mayfield’s fingerprints did no match the scene of crime.
The FBI continued to investigate Brandon Mayfield, including bugging his house, etc, then on 6th May 2004 Bradon was eventually arrested, he was put in solitary confinement, his family told the evidence was “100%” and leaks to the press about the guilt of Brandon were made.
On 19th May 2004 the Spanish Police correctly identified who the fingerprint belonged to, an Algerian called -Ouhane Daoud.However the FBI continued to detain Brandon until the 21st – when the story made the news. Even then Brandon was still placed under home arrest until 24th May, when the FBI finally released him.
This case, along with the case of David Asbury, shows how large amounts of data, and fingerprints in particular, can and are misused.
Links:
The Register
FBI Statement
US Court Report