>> i'm doing everything i can to keep this gentleman on the phone because at that point he still hadn't given me his name. >> the caller was using an untraceable calling card and on the phone he seemed nervous. >> he said if i told you what i know the shooter's going to know that i told you. >> that first call lasted more than an hour, but the cops learned neither the name of the caller nor the killer. >> he was still afraid to give us any more information so i'm doing everything i can to gain his trust, just to keep talking to him. >> the informant agreed to call again the next day and this time he was more forthcoming. >> he started telling me that i needed to look for a girlfriend of the shooter that was from las vegas. he kept saying the shooter's where i am. >> the caller told beach that he was a retired air force serviceman and played in a band with the shooter. the shooter, he said, was his best friend. >> i asked him again to call the next day and he said i have to work, but i can call on thursday. i said okay. i'll be here waiting and he almost whispered, the shooter is jim huden. >> jim huden, in the age of google, that was all the break mark plumberg needed. by the end of the day the detectives knew that jim huden lived in south florida and played in a band and according to the band's website, one of