A major trial will take place this year in the US. Elshafee El Sheikh is accused of being a member of the Islamic State group, and of being one of the notorious IS Beatles, so named by their hostages because of their British accents - and accused of torturing and beheading journalists and aid workers. ITV News’ Rohit Kachroo secured interviews with El Sheikh and another of these men before they were transferred to US custody. Those interviews are expected to form part of the trial. So what are the ethics of interviewing suspected members of a terrorist group? Is it ever OK to give what amounts to publicity to people accused of such serious crimes? And how do you even go about doing it?