Defector : Steven Sotloff was responsible for killing foreign prisoners . Staged fake executions while reassuring them they would not be murdered . Captives were given Arabic names to lure them into false sense of security . Explains why hostages appear calm right to when knife is placed on throat .
Defector : Mohammed Emwazi was responsible for killing foreign prisoners . Staged fake executions while reassuring them they would not be murdered . Captives were given Arabic names to lure them into false sense of security . Explains why hostages appear calm right to when knife is placed on throat .