lyndsay, curtis' own daughter, took the stand. she told police her mother was alive that morning. >> she said she had felt better. >> reporter: but on the stand, with her dad's life on the line, she changed her story. telling jurors she was no longer sure her mom was alive that day. >> don't remember any of it. >> reporter: but it doesn't stick in your memory? >> nope. >> reporter: and yet, detective baird's notes, you do tell him the story about seeing your mother. and then with the videotaped interview with detective gibson, you seem quite clear about that morning, and yes, you saw her and went off to school. what had happened in the interim between your statement and going into trial, on the stand, and then kind of stepping back from all of that? >> it was the fact of no one had honestly asked me, sincerely, what had happened that day. and i had never taken time to actually think about it. i -- >> reporter: well, detective gibson did, a couple of years before, when he took your statement, right? >> but it -- again, i didn't kno