Another FBI F-up. Keep in mind that he was never charged with a crime. He was being held as a "Material Witness".
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Within two days of his arrest, the balance seemed to be tipping in Mayfield's favor after Spanish officials began to voice strong doubts that the fingerprint found on the bag was really his.
Spanish investigators told the Madrid newspaper El Pais that they had found only eight points of similarity between the print and Mayfield's - instead of the 15 required for an exact match.
In addition, Mayfield's family challenged authorities to check his passport - saying the attorney had not been out of the country in at least 10 years.