be firmly convinced that it was brett parker who not only had the motive but actually did kill tammy parker then bryan capnerhurst. >> prosecutors wanted the jury to know that the parker marriage wasn't what it seemed. brett had strayed. once with an out of town woman and several times with a local bank teller. lindsay mullins testified that they met, they texted and he shared some confidences about his marriage. >> he said that he slept upstairs and they slept -- or that she slept downstairs. >> but the parkers had more problems than just brett's affairs. they called ben stale else to the stand, a parker family friend. >> how did tammy feel about the marriage? >> well, as the years went by, she was unhappy. she had conversations. we had conversations regarding religion. brett did not believe in god, going to church. that was important to her. >> then ben revealed another bit of evidence about the parkers' shaky marriage. this one a bombshell. >> did your relationship become more intimate? >> yes. >> approximately how many years ago was that? >> about three years ago. >> and did that end? >