there's nothing. >> no one questioned rudy guede's guilt. trial ended, guede's sentence was reduced from 30 years to 16, leading some to ask, did he cut a deal? >> there's overwhelming dna evidence along with lots of other physical evidence that points to rudy guede. >> amanda's attorneys appealed the verdict and focused on challenging the dna evidence. >> when the appeals process began, it felt like they had another mountain to climb that right away you could tell that there was a very different tone, and, again, the key decision was whether or not they would allow an independent assessment of the forensic evidence. >> november 24th, 2010. 11 months after the guilty verdict, a second trial is granted. >> the defense presented a very compelling case, identifying rudy guede as the true killer, based on hard facts and motive. >> rudy guede came to the house. he broke in. he was in the bathroom. he left his own dna in the bathroom. meredith may have come home and surprised him. maybe he was lying in wait. i hate to say it, but it's kind of the

. >> in fact, one truth that is known is that this man, local drifter rudy guede is in jail, convictedin prison. and i might add with good behavior, he's allegeable and will probably receive daytime release this year. so while amanda and raffaele is being convicted trial after trial after trial, the real killer is going to be out of jail. they searched that crime scene for two months and they were not able to find one nanogram of amanda knox's dna. >> are you excited to see david? the statue of david. >> oh. >> long gone is the fresh faced 20-year-old who originally set off for italy with big dreams. >> really looking forward to actually getting a place to live. >> is she different? >> we're all different. >> yeah, i think. >> every single one of us. >> today, knox lives iner own apartment and can be seen on the streets of seattle getting coffee between creative writing classes at the university of washington. she's scheduled to graduate this spring but her future has once again been thrown into doubt. italy under an extradition agreement with the united states has the right to ask for

both knox and sollecito deny helping rudy guede to kill kercher.s serving 16 years for the murder but may be eligible for parole next year. so, martha, now the case will return to the supreme court but raises the possibility of a drawn-out extradition battle for knox. the kercher family, who long believed the pair were involved in the murder were at the trial and commented afterwards that this was the best outcome they could hope for, but that the prospect of another supreme court hearing, which could take up to a year or longer, was daunting. sollecito's lawyers said they were bitter but that the fight was go on and spoke about ping pong rulings that could drag on. the court also ruled that sollecito's passport would be withdrawn to stop him from leaving the country but no request for knox's movements to be limited. martha? >> wow, that is a big story. so, what do you think the likelihood is that the united states would allow her to be extradited back to italy? >> well, they say that no request will be made now until after the supreme court verdic

authorities also arrested this man, rudy guede. his dna and bloody fingerprint were found in the room where kercher died. guede was convicted in 2008. in 2009 knox and sollecito were convicted and acquitted in a second trial in 2011. >> amanda knox has been found not guilty. >> reporter: and just yesterday found guilty again. and in this seemingly never-ending game of legal ping-pong, knox will appeal to italy's supreme court yet again. we've also been told the family may appeal to the european court of human rights which has the power to overturn this verdict. norah? >> all right, peter, thank you. >>> and a massive security operation is under way this morning in and around new york city. tens of thousands of police and other officials are working to protect super bowl xlviii. the department of homeland security is declaring sunday's game in new jersey a level-one national security event. more than 1 million people are expected to take part in super bowl-related activities. >> on sunday, 4,000 security officers will be at metlife