he was involved in and then of course, the executions themselves. he's been in several videos taunting the united states threatening the west holding that signature commando knife and then personally beheading american and other hostages so that -- his name comes-- that his name comes out is a new development and raises questions like we've seen in all of these cases. how did someone who was known to intelligence officials in this case, british intelligence officials, not just slip through the cracks but stay on their radar for many years and then end up in syria and -- and rise to become one of the group's most prominent spokesmen and executioners? >> those are obviously very serious questions. we know that he first appeared in a video back in august. british government had reportedly, as you well know, richard, identified him some time ago but did not disclose his name for what they called operational reasons. with that said those major questions regarding this individual and how he was