(CNN) – U.S. special forces working with the FBI captured a key suspect in the deadly 2012 attack on the American diplomatic compound in Benghazi, Libya, U.S. officials said Tuesday.

Libyan militia leader Ahmed Abu Khatallah was captured over the weekend near Benghazi, U.S. officials said. His is the first arrest and detention by the United States in connection with the Benghazi attack.

CNN's Arwa Damon was able to find and interview Khatallah more than a year ago. Why did it take the U.S. so long to capture him?
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