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Alexanda Amon Kotey, a former British citizen, was allegedly a member of the so-called "Beatles," a group of English-accented ISIS fighters who abducted and killed American, British and Japanese citizens. Syrian Democratic Forces captured Kotey and El Shafee Elsheikh, another alleged member of the "Beatles," and the pair were extradited to the United States. Prosecutors allege their American victims included James Wright Foley, Kayla Jean Mueller, Steven Joel Sotloff, and Peter Edward Kassig.