call me guv. just call me anything but ma'am. >> you better stash that broom, mate.he new super might fancy a ride. >> right, what have we got? >> the usual stacks of forensic, and they're already moaning they can't do anything with it, and that'll take a week. there's loads of bullets, but they're damaged. >> what kind of bullets are they? >> heckler & koch .9 millimeter, or something comparable. >> yeah, and? >> well, the killer was stood here; he didn't move. he discharged a whole magazine in one burst, pulled the trigger, kept on firing till the gun ran out. >> so you're saying he was waiting here. >> i think so. the door opens, in comes nazir ahmed, together with the owner of the flat, michael johns. bang, bang, bang, bang, bang. >> how did he get in? >> he had a key. >> or it was someone that michael knew? >> or somebody used to locked doors. >> ah. hit man. >> i don't think so. >> no? >> he or she was not used to automatic weapons. the gun is set to continuous fire, but it's so light, you can't control it. >> amateur hit man? so have we got the murder weapon?