not hold back as she recounted the chilling details of angila wilder's murder to her old friend matt walterss arrested and now headed to court to share a very different version of her story. but first she talked to us, here is keith morrison with the conclusion of prairie confidential. >> cyndi wilder was tiny, almost childlike in her jail jumpsuit. barely five feet, maybe 100 pounds, a trusted teacher of the very young and innocent. and yet here she was in court answering to allegations of a very big crime, -- of lying to everyone, even those who loved her most. >> i felt betrayed because i felt sorry for her and as a sister i wanted to help her, and then to find out that it all felt like a big lie and that she was betraying me and i was deceived, it was terrible. >> no doubt. she did say what she said on those tapes with the confidential informant matt walters. >> if it was me i would've gone back and cut her fingers off. burn them, lit the house on fire. >> what did you think when you heard that? knowing there was a two year old child in the house at the time? >> i thought, well, those ar