Washington (CNN) -- During his two weeks aboard a ship to the United States, Ahmed Abu Khatallah was questioned by FBI interrogators over his alleged role in the 2012 Benghazi attacks that left four Americans dead. As it turns out, he was interrogated both before and after authorities told him of his Miranda rights -- which give him the right to remain silent to avoid self-incrimination, a U.S. official told CNN. But Abu Khatallah continued providing information to officials after being advised of those rights, the official said. The handling of his case has triggered fallout in Washington. "I have serious concerns that conducting a rushed interrogation onboard a ship and then turning Abu Khatallah over to our civilian courts risks losing critical intelligence that could lead us to other terrorists or prevent future attacks," Sen. Kelly Ayotte, R-New Hampshire, said in a statement Saturday.
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NEW: Official: Abu Khatallah denied involvement but gave info on others
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Abu Khatallah gave information before and after he was told his Miranda rights
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Sen. Lindsey Graham: Mirandizing Abu Khatallah "would be a mistake for the ages"
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He is suspected of being the ringleader of the September 2012 attacks in Benghazi, Libya
U.S. intelligence assets concocted a ruse to lure him to a villa where the @placeholder surprised him.