Portland, Ore. ? An American lawyer who was arrested two weeks ago in connection with the terror attacks in Spain was set free Thursday after evidence pointed to another suspect in the deadly train bombings.

Brandon Mayfield, 37, was released soon after Spanish officials said fingerprints found on a bag near the bombing site were that of an Algerian. U.S. authorities had previously said the prints were Mayfield’s. The bag contained detonators similar to those used in the March 11 blasts, which killed 191 people and injured 2,000 others.

“I want to thank my family and friends who were supporting me through what I will call a harrowing ordeal,” Mayfield, a convert to Islam, said as he walked out of the federal courthouse in Portland, grasping his wife’s hand and holding a Quran and a Muslim prayer rug.

In Arabic and then in English, Mayfield, a Kansas native, recited the Muslim prayer: “God is great. There is no God but God.”

His three children, ages 10, 12 and 15, rushed up behind him, and his wife’s eyes filled with tears. The family has insisted Mayfield is innocent, saying he has not been out of the country for at least a decade.

His mother, Avnell Mayfield, of Hutchinson, Kan., said she hugged her son when he arrived at his suburban Portland home. “I’m just elated,” she said in a telephone interview. “He’s much taller than I remember him being.”

Samer Horani, a board member of the Islamic Center of Portland, called Mayfield’s arrest a stark example of the FBI’s profiling of Muslims. “Ethnicity doesn’t matter. If you are Muslim you are suspect,” he said.

Mayfield, a former Army lieutenant who ran a small, struggling Portland law firm, was arrested May 6 as a material witness and was never charged. It is not clear whether the investigation against him has been dropped.

Brandon Mayfield walks with his daughter, Sharia Mayfield, 12, left, and his son, Famir Mayfield, 10, outside the federal courthouse in Portland, Ore., after he was released from custody. Mayfield, who had been arrested two weeks earlier in connection with the Madrid terror attacks, was released Thursday after Spanish officials said fingerprints found on a bag near the bombing site in Spain were that of an Algerian. U.S. authorities previously had said the prints were Mayfield's.