Mohammed Emwazi, the British-Kuwaiti man who has been identified as "Jihadi John," had long been known to British security services—and according to the advocacy group Cage, the way they treated him may have contributed to his radicalization. According to the group, when he tried to travel to Tanzania for a "safari vacation" in 2009, he was detained, questioned, and returned to the UK by security officials who accused him of wanting to join militants, and he complained about harassment by security services in the years afterward. Cage says that after Emwazi moved to Kuwait later in 2009, he returned to Britain for a visit the following year and was told he could not return to Kuwait, leaving him feeling trapped and unable to return to his job and fiance.
- According to court papers seen by the BBC, however, authorities believed Emwazi was part of a network "involved in the provision of funds and equipment to Somalia for terrorism-related purposes and the facilitation of individuals' travel from the United Kingdom to Somalia to undertake terrorism-related activity," and had at least one associate who ended up fighting in Somalia with al-Shabab radicals.