>> william styler said that. te investigator miller's doubts on june seventeenth 2014 after three and a half months in jail nancy styler was released. >> and my attorney, beth, was there. and she said, "good news. you're getting out." and i said, "great. you know, they figured it out." and then she said, "but there's a catch." >> reporter: she gave nancy a letter. it was a private note from trey. >> and in this letter, he tells me about the plea bargain that he took. and one of the sentences that i've read a million times over said "i know you're innocent. and you should believe i am, too." >> reporter: trey wrote that was only pleading guilty to save her. he didn't actually kill nancy pfister he wrote. he was falling on his sword for love. >> i cried that whole day, even though i was getting out. it should've been a, a great time. i can't believe he's having to do this. this system is sick. it's, you know, messed up. >> reporter: three days later, june twentieth, dr. trey styler formally pleaded guilty to second