. >> reporter: the tiny west wendover police department jumped on the case right away.an detective, donald burnham was in charge. >> there's no point in waiting. the longer you wait the bigger problem you have and the harder it will be to find them. >> hours now since mickey was due home. >> scared, upset, panic, worried because it was dark now and it was cold and she had no jacket and -- and in the bottom of my heart i knew something was really, really wrong. >> and you try to tell yourself, no, no, no, no, no. it can't be. >> yeah. >> then the police had an idea. maybe mickey's cell phone, the one she always used to keep in touch, would give them a clue. so they checked her most recent calls. and there it was. one particular number that kept popping up just before mickey disappeared. ten digits. would they lead detectives to mickey costanzo or something else altogether? ♪ but maybe not for people with rheumatoid arthritis. because there are options. like an "unjection™". xeljanz xr. a once daily pill for adults with moderate to severe ra for whom methotrexate did not

visit tobaccofreeca.com. >>> christmastime in west wendover, nevada.e. >> she was missing. it's not the same. and i don't ever think that's going to go away. i used to enjoy going and buying everybody christmas presents and wrapping them up and it wasn't the same. and then having to remember not to buy her something. >> kody patten and his fiancee toni fratto spent the holidays in jail awaiting trial. on new year's eve, kody turned 20. early in 2012 a legal deal emerged. kody would plead guilty to first-degree murder, get life in prison, but with the possibility of parole, no death penalty and in exchange he'd have to testify against toni. kody took the deal and just as suddenly changed his mind. instead, kody decided to take his chances in court, but just one day later the d.a. offered toni a deal, not the same deal. better. if toni agreed to testify against kody she'd be allowed to plead to second-degree murder with the chance of parole after just 18 years. by then toni would be just 36, and toni offered a chance to save her own skin by throwing kody

it looked like that was about to work in the case of the west wendover murder of mickey costanzo. forced her to witness and even in a minor way assist in the killing. apparently, like everybody else, she didn't know why kody did it, only that she, toni feared he'd kill her too, if she didn't go along. >> why was the question on the lips of just about every breathing, living soul in wendover, the idea that kody would brutally murder a childhood friend didn't make any sense, any more than the idea that toni would go to such trouble to visit kody in jail anis notes if she was deathly afraid of him as she claims. people had given up on the idea on getting any kind of an answer, when suddenly out of the blue a little gift appeared. toni, had been keeping a diary. >> before she confessed, toni gave it to kody's parents who turned everything over to defense investigator bill savage. >> in my opinion there was some valuable information in there with regard to toni's personality, her feelings. in this little book, toni poured out her fears, her hopes, her deep insecurities and what kody's