British national El Shafee Elsheikh found guilty of belonging to group known for their cruelty to captives, including 4 Americans who were killed

El Shafee Elsheikh one of four UK members of IS cell believed behind killing of journalists James Foley and Steven Sotloff, aid workers Peter Kassig and Kayla Mueller

Two IS terrorists go on trial for the killing of US journalists James Foley and Steven Sotloff, and aid workers Peter Kassig and Kayla Mueller