Defector : Mohammed who was responsible for killing foreign prisoners . performed fake executions while reassuring them they would not be executed . hostages were given Arabic names to lure them into false sense of identity . Explains why hostages are calm right to when knife is placed on them .
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 .