busy learning how to complain ♪ ♪ i've been busy learning how to make a change now i made a change ♪ ♪ ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ooh ♪ ♪ ooh ooh ooh ooh ooh ooh ooh ooh ♪ >> jimmy: band of horses. their album, "mirage rock" is out now. i want to thank jon favreau, gabourey sidibe. apologies to matt damon, we ran out of time. tomorrow night, pierce brosnan, greta gerwig and music from alice russell. "nightline" is next. thanks for watching! goodnight! [ cheers and applause ] >> tonight on 23450ig9 line, murder and mystery. innocent college student or cold and savage killer? tonight, this woman accused of killing her steady abroad roommate and locked up for years. amanda knocks in prison for years. in prison with no one to protect her. what knox said would go on after dark. >> he said would i like to have sex with him? >> chilling details of life behind mars. amanda knox says she's been waiting for this night, waiting to be heard. but with another trial looming, her freedom hangs in the balance. . tonight, a murder, a mystery. aman do knox. >> her storied captivated the world for many years. she was convicted of a horrid crime in a foreign land and at times, her innocence seemed more cold and calculating and remorseful. buyian sawyer speaks to amanda knox just weeks after the supreme court overturned her acquittal. every word she says here and in the pages of her new book waiting tor heard could affect her freedom. >> reporter: an american girl back at home. >> nice, neither of us fell. >> reporter: sometimes she say she is's just that daughter who never left and wanted to be near her parents. >> she was always home and eating your food. yeah. >> my mom, i can tell anything to, anything. sometimes when she doesn't even want to hear it. >> reporter: there is much to hear. a 5 1/2-year-old journey that began in a seattle suburb and ended with amanda knox becoming a global obsession, in headlines called a sexual thrill seeker, a sed seductress of her roommate. >> i've heard the gist of them. and they're wrong. for all intents and purposes, i was a murderemurderer, whether r not. >> reporter: as a junior, she decided to venture out. an adventure of fill in the blank? >> self-hood? >> she worked three separate jobs to hearn the money for her year abroad. her mom was excited. >> wanting many eto go for it, to be brave, to go out and be my own person. i really got that from my mom. >> reporter: her sister deanna dropping her off in italy and making a video while she headed there, teasing her about her new life and the boys she would meet. >> are you excited to meet david? the statue of david. >> i don't know what it is about people that think that guys are not attractive physically but -- with. >> you look at the picture of the girl who arrived there, what would you want to say? >> i want to tell her not to be afraid of what's going to happen. because what happened to me hit me like a train. and there was nothing i could do to stop it. >> reporter: she had only been in italy five weeks, going to school in the morning and going to bars at night. one night she sees a young man who reminds her of harry potter. a graduate student in computer science. raffaele sollecito says he can't mean the beautiful american is looking at him. >> he writes about how taken he was with me. and i really liked him as well. >> reporter: they become a couple for just one week, seven days before they enter the 24 hours that are at the center of this mystery and this debate. starting with the night of november 1, mer zit kercher is murdered. >> what are you doing the night of november 1? >> november 1, we stayed in. and we had dinner, we watched a movie. >> reporter: a witness confirmed she and raffaele were in his apartment as lates a 8:40 p.m. the internet confirmed they ordered the movie "amelie." >> we smoked, we had sex. we made faces at each other. we were just getting goofy. >> jimmy: how high were you? >> i smoked. what it did with my memories was make them less concrete, but it didn't black them out or didn't change them. >> reporter: you remember with clarity that you did not go out that night. you stayed in the whole night? >> we stayed in the whole night. >> reporter: the next morning it's undisputed that knox is the first person in the house after the murder. she said she made the five minute walk to take a shower at home and get fresh clothes. >> reporter: you go homeme to te a shower. he has a shower. why go home? >> he had a crummy shower. >> reporter: she noticed the front door standing open. thought it was odd but the latch didn't always work. she took a shower after seeing blood in the bathroom sink. she wondered if meredith hadn't cleaned it up or was it her own newly pierced ears. >> i noticed there were speckles of blood. but speckles, a few drops. >> did you see the bath mat? >> not yet. i saw that when i was getting out of the shower. i thought it was strange. >> reporter: but you know people look at this and they say, door open, blood in the bathroom. those are red alarms. >> i had never before experienced anything in my life that was drastic. i didn't think oh, my god, someone has been in here and murdered someone. >> reporter: amanda knox said she went back to rafaele's and they went back to the house together. they saw evidence of a break-in and they called police. amanda knox said she was on the phone with her mother when she heard a torrent of italian she doesn't understand. >> someone was screaming a foot. i said i don't know, i don't understand. and someone was crying out meredith. i heard it must be meredith and there was a mod body and arm oo a blanket. >> reporter: at this point on, amanda knox and her behavior will be a kaleidoscope, shifting shapes. what you think is evidence of guilt or what she says just a kind of tone deaf girl in a trauma. the police will say it's guilt and heartlessness. did you kilml meredith? >> no. >> jimm . >> reporter: were you there that night? >> no. >> reporter: is there anything you haven't told police? >> no. i wasn't there. >> reporter: at the police station she sits in raffaele's lap making faces. you said she suffered. i said how could she not? she got her f-ing throat slit. >> yeah. i was angry. pacing. wondering what she must have gone through. >> jimmy: do you regret that now? >> i wish i was more mature. >> this does not read as grief. >> jimmy: i thi . >> i think everyone's reaction to something horrible is different. >> reporter: video taken outside the house the day of the murder. >> i have seen the same picture like the kissing just can't stop. that's not what that was. >> reporter: you look at the tape. there's three quick kisses then look into space thinking about random fate. >> i felt very lost, very vulnerab vulnerable. my friend got murdered. it could have just as easily been me. somehow she had died in the house where we were living. and it could have been me. >> reporter: she would be arrested, convicted, sentenced to 26 years. when we come back, she talks about the long nights in prison and the encounter with a prison official. >> it was always after lights were out. and no one was out and about in the prison, and he would call me into an empty office and talk to me. >> reporter: just talk. great first gig! let's go! party! awwwww... arigato! we are outta here! party...... finding you the perfect place, every step of the way. hotels.com i had[ designer ]eeling enough of just covering up my moderate to severe plaque psoriasis. i decided enough is enough. ♪ [ spa lady ] i started enbrel. it's clinically proven to provide clearer skin. [ rv guy ] enbrel may not work for everyone -- and may not clear you completely, but for many, it gets skin clearer fast, within 2 months, and keeps it clearer through 6 months. [ male announcer ] enbrel may lower your ability to fight infections. serious, sometimes fatal events, including infections, tuberculosis, lymphoma, other cancers, nervous system and blood disorders, and allergic reactions have occurred. before starting enbrel, your doctor should test you for tuberculosis and discuss whether you've been to a region where certain fungal infections are common. you should not start enbrel if you have an infection like the flu. tell your doctor if you're prone to infections, have cuts or sores, have had hepatitis b, have been treated for heart failure, or if you have symptoms such as persistent fever, bruising, bleeding, or paleness. if you've had enough, ask your dermatologist about enbrel. get younger looking skin fast. with new olay regenerist micro-sculpting cream. with 2 new anti-aging ingredients. visible wrinkle reduction starts day 1. see younger looking skin before you finish one jar. new from olay. see younger looking skin before you finish one jar. join us at projectluna.com i'll just prt s this, and you'll se on both. [bell dings] ladies and gentlemen, boys and girls, llllet's get ready to bundlllllle... [ holding final syllable ] oh, yeah, sorry! let's get ready to bdle and save. now, that's progressive. oh, i think i broke my spleen! >> just over three year, the judge's gavel fell on amanda knox. when all the cameras went away, so, too, did her freedom. convicted of murder, she began a 26-year sentence inside an italian jail where she says the darkest hours of her life ticked slowly and painfully away. here abc's diane sawyer. >> reporter: for more than four years, amanda knox parents will shuttle 6,000 miles back and forth from seattle. kurt knox and eda melice divorced years ago now united in a mission. t her mother measures her life in her trips to porussia. >> she doesn't have anything else and somebody needed to be there to visit her. >> in the 15th century courtroom with its crucifix and frescos, amanda knox every day watching her parents fight their way through the press to be in the courtroom with her. also watching, another family is, certain amanda knox is involved in the death of their child, meredith. >> reporter: did you look at her family? >> i looked for them. i hadn't been prepared for the idea that they might consider me the murderer of their daughter. >> reporter: amanda knox's family rents an apartment, 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: did you think what it was costing them spiritually, actually? >> i felt incredibly guilty for what they were having to sacrifice for me. and there was a certain point in my thinking in prison that if it didn't work out and i was never free again, i was trying to figure out how i could ask them to move on with their life without me. because i was tired of them having to sacrifice everything for me. >> reporter: and now, we are hearing what her parents didn't see during their visits. you wrote as if i felt i was being sealed into a tomb. >> yeah. and the tomb was my life. it wasn't the prison. it was my life. >> reporter: did you think about suicide? >> i did. >> reporter: she writes she considered cutting her wrists in the shower or swallowing bleach. >> there are plenty of ways you could kill yourself and people did. and i imagined doing them all. >> reporter: she had panic attacks, began to lose her hair. and after the lights her out she said a prison official would sometimes call her into an empty office to talk. just talk? >> just talk. but he would talk to me about sex. he asked me what kind of sex i liked to have and what kinds of people i liked to have sex with and would i like to have sex with him. >> reporter: you didn't get up and walk out? >> i didn't know i could, if i could. i was in a room locked in a room with a prison official. >> reporter: she had been in prison 1,427 days when the appeals court judge issued a scathing criticism of that first trial, citing dubious reliability of key witness, nonexistence of the evidence and a motive he said they couldn't prove. >> i spent a long time in prison. i had to grow up in prison for something i did not do. >> reporter: amanda knox is sobbing. acquitted she'll go free. outside, italians, outraged at her freedom felt shame, shame. my antidepressant worked hard to help with my depression. but sometimes, i still struggled to get going, even get through the day. so i was honest with my doctor. i told her i'd been feeling stuck for a long time. she said that for some people, an antidepressant alone only helps so much and suggested we add abilify (aripiprazole). she said that by taking both, some people had symptom improvement as early as 1 to 2 weeks. i wish i'd talked to my doctor sooner. [ female announcer ] abilify is not for everyone. call your doctor if your depression worsens or you have unusual changes in behavior, or thoughts of suicide. antidepressants can increase these in children, teens and young adults. elderly dementia patients taking abilify have an increased risk of death or stroke. call your doctor if you have high fever, stiff muscles and confusion to address a possible life-threatening condition. or if you have uncontrollable muscle movements, as these could become permanent. high blood sugar has been reported with abilify and medicines like it and in extreme cases can lead to coma or death. other risks include increased cholesterol, weight gain, decreases in white blood cells, which can be serious, dizziness on standing, seizures, trouble swallowing, and impaired judgment or motor skills. [ sally ] since adding abilify, i feel better. abilify and my antidepressant make a pretty good team. [ female announcer ] ask your doctor about a free trial of abilify and go to addabilify.com. [ female announcer ] ask your doctor about a free trial of abilify geico and we could help youo save on boat and motorcycle insurance too. other insurance companies are een with envy. oh, no, no, no...i'm sorry, but this is all wrong? i would never say that. writer: well what would you say? gecko: well i'd probably emphasize the savings. ya know...lose that green with envy bit. rubbish. it's just a reference about my complexion. writer: but the focus groups thought that the... gecko: focus groups. geico doesn't use focus groups. uhh...excuse me. no one told me we were using focus groups. vo: geico. fifteen minutes could save you fifteen percent or more on car insurance. cheryl burke is cha-cha-ing in depend silhouette briefs for charity, to prove that with soft fabric and waistband, the best protection looks, fits, and feels just like underwear. get a free sample and try for yourself. even the inside of your dishwasher sparkles. whoa! kitchen counselor. see, new cascade platinum is unlike finish gel. it not only cleans your dishes, it helps keep your dishwasher sparkling. [ female announcer ] new cascade platinum. >> more than 1,400 days, life as amanda knox knew it before traveling to italy had ceased to exist. her really had become the dark inside of a building erected to punish. her days, waking nightmares. and then in 2011, italian courts overturned amanda knox guilty verdict. she embraced newfound freedom, a freedom that may once again be in jeopardy. and once again, diane sawyer. >> reporter: amanda knox is once again walking freely after being locked for four years. >> fist thing that made me realize that i was home, getting off the airplane was the smell. none of us felt at home when you were gone. it was strange. it wasn't right. there was that little piece missing. >> reporter: her mother eda has watched her cry while writing the book "waiting to be heard." >> to have her put down in writing, you know, how painful or how sad or how lonely she is is awful. >> reporter: knox has spent the last year putting it into words. >> all of my memories were very, very, very clear. and this is not something i'm known for having a very clear memory. because i tend to just blur my memories together any given day. but my memories in prison were very clear. >> reporter: and the latest blow -- >> a stunning reversal. >> a new trial for amanda knox. >> reporter: which happened just two weeks before this interview. the supreme court overturning the acquittal that set her free. the case now back on trial again. >> i felt like after crawling through a field of barbed wire and finally reaching what i thought was the end, it just turned out that it was the horizon. >> reporter: and there is that family for whom this story will never be