gathering i assume involves everything from friends, family, jobs, internet connections, member of any groups. take us through all that. >> absolutely. now i think the intelligence services in the uk and in europe and even in the united states are digging into what they have about salman abedi, about his connections, the fact that he's libyan. is there a connection in libya and with whom? is there connection with isis or is it section with islamist groups like the libyan fighting groups who operate under al qaeda. they look into his social media presence, his cyber footprint. they collect dna evidence, cctv camera inputs. they look into friends and family. i am sure that they already probably conducted a search into his apartment. they talked to family and friends. they see what inspired him to conduct that attack.