Kassig 's family said he converted to Islam while being held hostage and now goes by Abdul-Rahman . Syrians Peter Kassig , 26 , helped treat wounded American . He served in the U.S. military in Indiana but looked for a `` game changer '' after returning home . His parents in Indianapolis , Indiana , confirmed he 'd been taken hostage . Islam converted to Kassig while being held hostage , family says .
Syrians Peter Kassig , 26 , helped treat wounded American . He served in the U.S. military in Indiana but looked for a `` game changer '' after returning home . His parents in Indianapolis , Indiana , confirmed he 'd been taken hostage . Islam converted to Kassig while being held hostage , family says .