he knew so well. remembering the old times when life was simple. and the future held so much promise. taking time to reflect on how it happened. a few days from now, it will all be over. one way or another. >> my carbon monoxide detector going off, and my wife is having a seizure. >> our story begins in ohio, on a frantic predawn morning september 4th, 2006. doctor mark wrangler says he woke to the sound of an alarm. >> what kind of alarm? >> just allowed, piercing noises. and they determined that it was a carbon monoxide, iran to check on kathy. >> kathy was -- and most of her life suffered from epilepsy. she was sleeping upstairs. >> i went in, shook her, called out to, her scream that.