The moving goodbye letter a murdered ISIS hostage wrote to his parents has been read at the trial of the terror suspect accused of masterminding his abduction. Peter Kassig wrote the final letter to his parents Ed and Paula five months before he was beheaded by Jihadi John in November 2014, and revealed that he did not believe his captors' claims that his family had given up on him. It was read at the trial of El Shafee Elsheikh, 33, Wednesday by Peter's retired teacher dad Edward Kassig, who struggled to hold back tears, as Kassig's mom Paula, a former...