be firmly convinced that it was brett parker who not only had the motive but actually did kill tammy parkern 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 mull ens testified that they met, they texted, and that he shared some confidences with their marriage. >> he said that he slept upstairs and she slept down. >> but the parkers had more problems than just brett's affairs. they called ben staples to the stand, a parker family friend. >> how did tammy feel about the marriage? >> as the years went by she was unhappy. we had conversations regarding religions. 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. >> and approximately how many years ago was that? >> about three years ago. >> and did that end? >> it did. it did not end our friendship. we remained