maynard: demento's crazy. tried to keep him to a schedule, but he wanted to move faster and faster he decided to pull these carjackings. said he wanted to be known for selling expensive wheels. nice timing on the photo. david: forensics matched the bullet we found in brentwood to one shot through the head of a fast food worker in tarzana about two years ago. witness in that case id'd walter gordon, aka demento. megan: what i don't understand is how did quilty's phone let the robbers know where track victims were? well... quilty must have put a sniffer on a node. a node is something that takes all the calls coming into a cell tower and then relays those signals to where they're going. a sniffer is an electronic device that detects specific calls, then sends that signal to a phone the robbers must have. and you think quilty's phone could do that? i think so. all he needed was access to the cell towers. because he worked at a wireless company, he had that. charlie: and the gear required, well, he could buy that a