he fled perugia the day after the murder.he was at the house the night, but just going to the bathroom. and amanda knox was not there. a year later, his story had changed. he says he did see her through a window. but here is the issue that is at the center of the trial and the question of reasonable doubt. rudy guede's dna is everywhere in meredith's room, on her purse, where her cell phones and money are missing. the bloody shoe print they once said was raffaele's, was his. and the handprint matched his exactly. also inside meredith's naked body, rudy guede's dna. so, how could police explain the fact that at the crime scene there is not once trace of dna from amanda knox? the prosecutors will say she must have cleaned hers off. they have said that you cleaned the room somehow or you cleaned the premises of your dna. >> well, that's impossible. it's impossible to see dna, much less identify whose dna it is. >> reporter: the trial will continue for 318 days. every day watching, her parents who believe in her, and fight their

her mother a math specialist in a local school measures her life in trips to perugia. >> as a mom will leave your child in a foreign country with nobody to visit her. she doesn't have anybody else. somebody needed to be there to visit her. >> reporter: in the 15th century courtroom with its crucifix and frescos amanda knox watching her parents who fight their way in the press to be in the courtroom with her. also watching another family certain amanda knox is involved in the death of their child, meredith. did you look at her family? >> i looked for them. i hadn't been prepared for the idea that they -- that they might consider me the murderer of their daughter. >> reporter: amanda knox's family rents an apartment outside perugia. living for the days they visit in prison. twice a week for one hour. >> i saw them 1% of the time. and yet they were always there. they were there 100% of the time. >> reporter: and now we are hearing what her parents didn't see during their visits. did you think about suicide? >> i did. >> reporter: she writes she considered cutting her wrists in the shower

[ticking] >> in the beautiful italian province of perugia, men roam the frosty hills with their trained dogs, hunting for the most expensive food in the world. so this is $1,000? just right there is $1,000. but as we found out, anything this rare and expensive can attract a dangerous clientele. >> [speaking french] >> everybody's in danger in this business. >> krrrk. >> welcome to 60 minutes on cnbc. i'm bob simon. in this edition, we're going to visit with a driving force behind the resurrection of chrysler. and later, hunt for the most expensive food in the world. but first, we begin with a story about the rapidly growing trade in fake stem cell cures. many people with incurable illness look forward to the promise of stem cells. stem cells have the potential to turn into any kind of cell, and in theory, they could repair damaged cells. scientists tell us that we are years away from realizing that dream. but conmen have moved in to offer the hope that science cannot. just look online and you'll find hundreds of credible-looking websites offering stem cell cures in overseas clinics. as

recently learned how she was being portrayed in the media and as she faced charges, she-devil, sphinx of perugia are only a few of the labels but they're all wrong, she says. here's brandi hitt. >> reporter: amanda knox released her memoir "waiting to be heard" in an exclusive interview with diane sawyer knox said she wants to clear her name. >> did you kill meredith kercher? >> no. >> were you there that night? >> no. >> do you know anything you have not told police that you have not said in this book, do you know anything? >> no. >> reporter: knox was an american college student studying abroad when arrested and tried for the 2007 murder of her roommate, british student meredith kercher. >> what happened to me hit me like a train and there was nothing i could do to stop it. >> reporter: knox and her then boyfriend were both convicted in italy a highest court after serving four years of a 26-year sentence in a tiny room with only a small window, her conviction was overturned. >> did you think about suicide? >> i did. >> reporter: in her book knox wrote about her panic attacks, losing her hair a

. >> i traveled to perugia to the house they all once lived.nhabited by bangladeshi immigrants, who showed me the tiny room of the murder, saying they barely heard of this case. i also talked to some of the thousands of college students there right now, who said, it's just a distant memory, that name, amanda knox. >> so to the 250,000 students who head abroad, what's your advice? >> study abroad. study abroad in italy. just know your rights. be in touch with your family. be careful. >> and amanda knox says she hopes in years to come that she will be finished with this case, have a family of her own. she said she will tell her children to look closely at anything they put on their website, as if it could be used to destroy them. and as we said, amanda knox's book, "waiting to be heard," is on the book shelves now. >>> coming up next here, why the "wedding crashers" may have had the right idea. our instant index tonight. before copd... i took my son fishing every year. we had a great spot, not easy to find, but worth it. but with copd making it h

sphinx of perugia. >> haven't heard those. i mean, i've heard the gist of them. and they're wrong.i was in the courtroom when they were calling me a devil. i mean, it's one thing to be called certain things in the media, and then it's another thing to be sitting in a courtroom, fighting for your life while people are calling you a devil. >> criminal defense attorney knows the knox case intimately. he is here to share his perspective. and the reason you know it intimately, for full disclosure, you worked as an unpaid consultant for the knox family during the first trial. so i'm sure you watched. what was your impression of amanda knox? >> my impression was that this is a young girl who after four years of being incarcerated for a crime she didn't commit was sort of letting it out a little bit. you know, people were quick to criticize her, her reactions, her, you know, her emoticons, all these different things. here was someone who was in jail for four years as a young teenager, having things happen to her that she wouldn't wish on our worst enemy. you have to understand, this girl i

forget interviewing you, kurt, and deanna, on the night just three hours after amanda was convicted in perugiacollapsed in anguish because you couldn't even speak. deanna, you were so distraught you got physically sick to your stomach at the courthouse. this is you and kurt just hours after that verdict was handed down. let's take a listen. >> i was stunned. how could you even do this with what was presented in the court of law? >> we yelled across the courtroom as they were taking her away that we love her because we couldn't see her. >> you know, you have to put on a face when we go and visit her, we can't cry. >> are you going to be able to do that? >> we hope so. >> what's it like for you to see that moment in your family's history? it was so difficult for you. >> it's emotional. i don't think i've ever seen that just because i couldn't watch. i couldn't be there. i was not functioning that night. >> it doesn't look real. it doesn't seem like it was real in the moment because i still don't think of it as being real like it all happened. it's interesting to see. >> i'm glad it's past and we