she called me crying unconsolably, something awful had happened. the pain was huge for her, for our family. it's been excruciating. >> in this celebrated place, a shattering case. the prep school rape trial. >> i was violated. >> a pretty freshman, a popular senior. >> he was handsome. >> captain of the soccer team. >> glasses. looking like harry potter. >> what had happened that night? and who was telling the truth? tonight an exclusive interviews, both sides break their silence. >> she just wanted to do what was right. >> he is an honest, kind, caring person. >> at the heart of it all, a secret. >> a facebook message. >> these boys were involved in a game. this was a game to them. >> you saw emotion in him, real emotion. >> it could be my son, it could be your son. >> it's just tragedy all the way around. >> i'm lester holt. and this is "dateline." here's natalie morales with "one spring night." >> reporter: it's a place where young dreams are nurtured, where young adults are taught to live meaningful lives and are sometimes groomed for greatness

it was at midnight and she called my crying unconsolably and she said something awful had happened. >> reporter: prosecutors say he lured the girl to a roof where they had sex. they say it was part of a ritual called senior salute. which involved graduating senior boys wooing younger girls. the case went to trial this summer. he was acquitted of felony rape charges but found guilty of a lesser felony. using a computer to lure his underage accuser and found guilty of misdemeanor sexual assault. the victim testified against him. a brutal experience, according to her mom. >> it has been excruciating for her. but being a pretty pure soul, she just wanted to do what was right. >> reporter: yesterday, a judge sentenced labry to a year in jail and he is required to register as a sex offender for the rest of his life. the victim spoke emotionally in a video played during sentencing. >> without just and right punishment, i really don't know how i'll put one foot in front of the other. i don't want to felix prisoned for the rest of my life. >> reporter: lab re once planned to study theology at

and she called me crying unconsolably, and she said something awful had happened. and i said i would be there in the morning and we would get through it together. >> reporter: what she couldn't have known then was that this throw her daughter into the glare of the spotlight and a very ugly, very public battle that would change her life and the life of owen labrie perhaps forever. >> when we come back -- - >> she was in shock, kind of shocked and disbelief. >> owen's senior salute, an invitation or a competition? >> there was a lot of underaged girls being targeted, not just her. >> what did happen in that darkened building on campus? question for police. quiet! mom has a headache! had a headache! but now, i...don't excedrin is fast. in fact for some, relief starts in just 15 minutes. excedrin . now available in geltabs. why do i cook for the holidays? to share with family to carry on traditions to come together, even when we're apart in stuffing, mashed potatoes, gravy, and more, swanson makes holiday dishes delicious! w can you see yourself in new glasses... witho

unconsoleably. something awful had happened. >>> prosecutors say he lured her to roof where they had sex. they say part of ritual call senior salute which involved graduating senior boy wooing younger girl. he was acquitted of felony rape charge but lesser felony using pure to lure his unaged accuser and found guilty of mismeanorsel assault. the victim testified against lebree a brutal experience according to her mother. it's been excruciating for her. but being a pretty pure soul she wanted to do what was right. a judge sentenced him to a year in jail. he also required to register as sex offender for the rest of his life. the victim spoke emotionally in a video played during sentencing. >>> without just and right punishment, i don't know how i will put one foot in front of the other. i don't want to inch life. he want planned to study theology alternate harvard. he's a kind loving soul and genuine person. he's a phenomenal incredible person to be around. for now he remains free while an appeal is p