The Washington Post and BuzzFeed have identified a second member of the British cohort within the self-proclaimed Islamic State who oversaw the detention, abuse and beheading of Western hostages in Syria. Alexanda Kotey, who grew up in West London, is one of the four guards hostages dubbed the “Beatles” because of their British accents. Another member of the group, Mohammed Emwazi, known as “Jihadi John,” was killed in a drone strike in November.