Paula Kassig asks her to respond to the BBC 's plea for her son 's life . Kassig has been held captive since being detained October 2013 on his way to Deir Ezzor , Syria , his family has said . ` ` Please tell us what more we can do , '' she says via Twitter . Her son converted to Islam in captivity and took the name Abdul Rahman Kassig . He was threatened at the end of a video showing the killing of Labour MP David Henning .
Paula Kassig asks her to respond to the BBC 's plea for her son 's life . ` ` Please tell us what more we can do , '' she says via Twitter . Her son converted to Islam in captivity and took the name Abdul Rahman Kassig . He was threatened at the end of a video showing the killing of Labour MP David Henning .