tinnes, at some point did your relationship with lisa techel become sexual? about actual sexual intercourse correct? >> yes, sir. >> for lisa's father, the revelation that his daughter had a lover was the cruelest blow yet. >> the first emotion i had is, "why? why, lisa? " you know? and my second thought is, "i don't wanna tell amy'cause i know she's not gonna be happy. " >> does it taint your memory at all? >> really, what it did for me more than anything is, i have so many more questions that i'll never get the chance to ask her. i mean, i love lisa and she was a human being and she made mistakes. >> the graphic testimony about lisa's affair and how police overlooked it, fit perfectly with the defense's theme of a botched investigation and a rush to judgment against seth. >> here's a legitimate suspect that should have been investigated. >> investigators never spoke to jason while they were building their case against seth. prosecutors finally contacted him just days before the third trial started. >> so, between may of 2012 and sometime in june of 2014, no

. >> lisa techel, newly married, pregnant, starting the career of her dreams. >> she always put everybodyle shotgun blast rocked the newlyweds'home. >> she's been shot. >> a young husband, out of his mind with grief.