pete orput: she's screaming in a high pitch, saying oh my god, oh my god.rt saw byron smith wipe away tears as the audio played. there was stunned silence, save for the quiet sobs from nick and haile's families. can you ever erase that from your memory? not ever. i think ever since i heard it, it's been replaying in my head over and over. i feel like anytime i hear somebody say oh my god, that's what i think of. kate snow: but the prosecution wasn't done with that recording. because byron continued to talk to himself after the teens were dead. by now, kimberly had heard all the facts she needed. what do you hear when you hear those words? pure evil. i don't know how you can say that about anybody, let alone two precious kids. and i don't believe he was scared. i believe it was premeditated murder. kate snow: but in court, the defense said that recording, as disturbing as it is, proves no such thing. rather, it shows a man quite possibly driven mad with fear. he's talking to himself, mumbling things. a lot of things didn't make sense. he sounds, frankly, lik