Abdul Rahman Kassig asks Islam to respond to the family 's plea for her son 's life . `` Please tell us what more we can do , '' she says via Twitter . They released a YouTube video imploring them to `` use their power to let our son go . '' Her son converted to ISIS in captivity and took the name Alan Henning . He was threatened at the end of a video showing the killing of Iraq hostage Alan Henning .
Abdul Rahman Kassig asks Islam to respond to the family 's plea for her son 's life . `` Please tell us what more we can do , '' she says via Twitter . Her son converted to ISIS in captivity and took the name Alan Henning . He was threatened at the end of a video showing the killing of Iraq hostage Alan Henning .