reporter: eddie o'brien was just 15 years old when he was charged with killing his best friend's mother. >> is the defendant guilty or not guilty? >> not guilty. >> convicted and sentenced to life in prison without parole, o'brien has always maintained his insurance but hasn't spoken publicly in more than 20 years. so you're adamant you didn't kill janet? >> very adamant. if you really look at the evidence, you'll see the truth is i didn't do anything. reporter: that's all lawyers will let him say with the case, refusing to talk about thest or the woman he was convicted of killing. janet downing was murdered in side her home in the summer of 1995. the single mom stabbed more than 90 times. her teenage son who was o'brien's friend found her body. o'brien a former alter boy lived across the street from the downings. he became a suspect after police doubted his story that he had been mugged the same night as the murder. >> eddie o'brien. reporter: in court o'brien said he had cuts on his hands and dna evidence from the crime scene. >> i was always under the impression i was going to testif

cheryl shawrl eddie o'brien was just 15 years old when he was charged with killing his best friend's mother. >> is the defendant guilty or not guilty? >> guilty. >> cheryl: convicted and sentenced to life in prison without parole, o'brien has always maintained his innocence. but he hasn't spoken publicly in nearly 20 years. until now. so you're adamant you didn't kill -- >> very adamant. if you look at the evidence, you'll see the truth. >> cheryl: what's the truth? >> the truth is i didn't do anything. slairl cheryl that's all his lawyers, who are working on an appeal, will let him say, refusing to let him discuss the case or the woman he was convicted of killing. janet downing was murdered inside her home in 1995, stabbed more than 90 times. o'brien's friend, found her body. o'brien a former altar boy and the grandson of the city's long-time police chief lived across the street of the downings. he became a suspect after police doubted his story he had been mugged the same night as the murder. >> you eddie o'brien? >> i just got jumped. >> reporter: in court prosecutors had cuts on h

absolutely not. >> eddy o'brien was just 15 years old when he was charged with killing his best friend's mother. >> is defendant guilty or not guilty? >> guilty. >> convicted in sentenced to life in prison without parole, o'brien has always maintained his innocence. but hasn't spoken publicly in nearly 20 years until now. so you're adamant you didn't kill her? >> very adamant if you really look at the evidence, you'll see the truth. what's the truth? the truth that is i didn't do anything. are working on an appeal will let him say about case refusing to let him discuss evidence or talk about the woman he was convicted of killing. >> janet downey was murdered inside her home in summer of 1995. the single mom stabbed more than 90 times. a teenage son who o'brien's friend found her body. o'brien a former altar boy in grandson of city's long time police chief, lived across the street from the downings. he became a suspect after police doubted his story that he had been mugged the same night as the murder. >> eddy o'brien. yeah i got jumped. in court prosecutors said o'brien had cuts on his h

>> absolutely not. >> reporter: eddie o'brien was 15 years old when he was charged with killing his best friend's mother. >> is the defendant guilty or not guilty? >> guilty. >> reporter: convicted, o'brien has always maintained his innocence. but hasn't spoken publicly in nearly 20 years. until now. didn't kill janet? >> very adamant. if you really look at the evidence, you will see the truth. >> reporter: what is the truth? >> the truth is that i didn't do anything. >> reporter: that is all his lawyers will let him say about the case. refusing to let him discuss the evidence or talk about the woman he was convicted of killing. janet downing was murdered in the summer of 1995. inside her home. the mom stabbed more than 90 times. her teenage son who was o'brien's friend found her body. o'brien, a former altar boy and the grandson of the city's long-time police chief, lived across the street from the downings. he became a suspect after police doubted his story that he had been mugged the same night as the murder. in court, prosecutors said o'brien had cuts on his hands and d.n.a. evidence

eddie o'brien was just 15 when convicted of killing his best friend's mother 20 years ago. he was sentenced to life in prison without parole. he hasn't spoken publicly in nearly two decades until now. 7 investigative reporter cheryl fiandaca has the interview you will see on just one station? >> did you kill her? >> absolutely not. when he was charged with killing his best friend's mother. >> is the defendant guilty or >> guilty. >> convicted and sentenced to life in prison without parole o'brien has always maintained his innocence but hasn't spoken until now. >>> you're adamant you didn't kill >> very adamant if you look at truth. >>> what's the truth? anything. >> that's all his lawyers working on appeal will let him say about the case refusing to let him discuss the evidence or talk about the women he was convicted of killing. >> janet downing was murdered 1995. the single mom stabbed more than 90 times. her teenager son whos o'brien's friend found her body. o'brien a former alter boy and the grandson of city long-time police chief lived across the street from the downin

now eddie o'brien is speaking publicly for the first time in nearly two decades. it's an interview you'll see on just one station. >>> breaking news, the red sox paying a big price tonight. reports the team is bringing a big name tall don't boston. >>> and we go begin with breaking news from fenway park. the red sox adding some serious star power to the mound. david price is coming to the best pitchers in the game. >> tonight the sox front office landing the biggest pitching prize in free agency. director joe amorosino with all the details. reporter: the red sox need an ace in the worst way. the team's president of baseball operations went out and got the best one on the market landing david price, seven years, $217 million. that's $31 million per year and that is the going rate for a 30-year-old perennial cy young award contender whose proving he can get it done in the american league east. an opt-out in three years but that's down the road. he's locked up a guy who despite his post season struggles is a bona fide ace. it's clear that democrat -- dembrowski is no

friend's mother speaking out from behind bars, the chance to change the legal system that could make eddie o'brien eligible for a new and this is how it works. most new wealth flows to the top 1%. it's a system held in place where wall street banks and billionaires buy elections. my campaign is powered by over a million small contributions, people like you who want to fight back. the truth is you can't change a corrupt system by taking its money. i'm bernie sanders. i approve this message. mornings. wonderful, crazy mornings. we figure you probably don't have time to wait on hold. that's why at xfinity we're hard at work, building new apps like this one that lets you choose a time for us to call you. so instead of waiting on hold, we'll call you when things are just as wonderful... [phone rings] but a little less crazy. we're doing everything we can to give you the best experience possible. because we should fit into your life. >>> there's another 60 minutes of 7 news ahead. i'm ryan schulteis. >> i'm kim khazei. >>> called to court. why one man is suing the school for discrimination. >>> plus a r

eddie o'brien is talking from behind bars. >>> first day of december we track rain showers headed for boston. we'll let you know when they awry.