The dramatic twist in a murder trial that sent a georgia man to prison for life. Waseem baker was convicted in the 1995 murder of a woman and brutally stabbing her 5-year-old son. Now, a key... See More
The dramatic twist in a murder trial that sent a georgia man to prison for life. Waseem baker was convicted in the 1995 murder of a woman and brutally stabbing her 5-year-old son. Now, a key prosecution witness is recanting much of her testimony. Abc's steve osunsami is in atlanta with the latest on her stunning reversal. Good morning, steve. Reporter: Good morning, robin. Convicted murderer and stalker waseem taker has always maintained his innocence. He has always said his main accuser was lying and this morning it appears he may have been right. I wanted it to stop. I wanted my life back. Reporter: The star witness who helped send waseem taker to prison for life. If I would have known it would have led to this I would have clearly done things differently but I can't. I can't take it back. Reporter: She was telling the court how she feared for her life. How he kept stalking her in the EARLY '90s BEFORE STABBING HER Roommate as an act of revenge when she finally called police. Flight attendant carmen smith was killed and her 5-year-old son was severely wounded. We find the defendant guilty. Reporter: This morning she has stumped everyone filing court papers defending taker saying much of what she said wasn't true and that he never threatened to kill or physically harm me. Some people have a conscience and perhaps that's what happened. Reporter: She was powerful on the witness stand facing down taker acting ace his own attorney. You stalked me and harassed me and I have to answer your questions. That's hard for me. Reporter: When she sat down last fall with "20/20" she cried as she explained how daker stalked her for years. He would show up at the store, everywhere. Reporter: Now she's admitting she willingly spent time with him and was under the influence of painkillers, muscle relaxants and other substances when she made those allegations. She's also tearing apart the dna evidence that connected him to the murders saying that the blanket police found at the crime scene with his hairs on it was one she had given her roommate before the murder, one daker slept on when he spent nights over. Daker said he's innocent all along saying he wasn't the masked man who attacked smith and her son. Do you remember telling them back in 1995 that the killer's eyes were blue. No, I was in the hospital and had gotten stabbed repeatedly by you. Reporter: This morning daker is in a prison and is saying i told you. He's already demanded a new trial. Lawyers tell us that blatz wrote daker in jail telling him she was going to come clean. In a statement overnight they say blatz has become unstable since trial. For more we bring in dan abrams. This is quite bizarre. I almost have never seen anything quite like this. She was a crucial witness in the case. She was the linchpin of the prosecution's case and yet i don't think this is going to make a difference. You don't think there will be another trial. No, here's why. Because first of all legally, courts look skeptically on recanted testimony. Number two, even when they're looking at it, the most important question is do they believe that it's genuine and i think it's very hard to believe this is genuine. When you actually read through what she is saying, it does appear at least to me to be more ranting than recanting. She accuses the judge of misconduct. She accuses the jurors of misconduct. She accuses the prosecutor of misconduct and accuses herself of misconduct in essence saying that all of them made mistakes and if you actually look at what she's saying it does appear to be a bit unhinged. At one point these a saying, well, my daughter came to court with a friend of hers and her friend's fiance now ex-ex-fiance's mother was friends with the juror and the juror said -- this is not the sort of stuff or recan. Tation in a classic case where we say, aha, they got it wrong. In essence admitting to perjury. Could she face charges. Thee rhett likely but I think the prosecutors will view her as becoming unstable and as a result I think that they're going to just hope this goes away.
This transcript has been automatically generated and may not be 100% accurate.