the process say isis hostages from france and other european countries were set free after ransom payments of about $2 million cash each. delivered by middlemen from turkey. something the u.s. has refused to consider. in 2014 alone, isis have gotten millions of dollars from kidnapping of western citizens. obviously we believe very strongly we need to cut off their funding. reporter: as the fbi steps up its investigation, some former hostages identified jim foley s executioner as one of three british citizens the hostages nicknamed the beatles, who served as jailers, torturers and executioners for the islamic terror group. in a final chilling e-mail sent to jim foley s parents by isis. they wrote, you do not spare our women, our children, our elderly, our weak, so we will not spare yours. and that s how foley s parents learned their son would die. brian ross, abc news, new york. and there is growing concern about the fate of a second