. >> marion victoria crandall. >> reporter: out of the presence of the jury, marion crandall told the court that, like carey zuck, she met tom through dar, and a couple of weeks after the farm to offer tom support. >> i don't mean to embarrass you but you had sex with tom in his living room? >> he tried to, and it was stopped. >> all right. who tried and who stopped? >> he tried, and we both stopped. >> you don't have a sexual relationship with somebody within two weeks after your wife's been murdered in that house. >> reporter: but the jury never heard marion crandall's testimony because there was no indication of a romantic relationship prior to dar's murder. the judge ruled, just as he did in the first trial, that her testimony was prejudicial and, therefore, inadmissible. it was a huge blow to the prosecution's case. >> it supports the position that they weren't this deeply in love couple that he kept trying to present. that would have proven that. >> reporter: but norris still had her two key witnesses, tom's sklyar wattie. both two years older and now more certain than ever abou

. >> marion victoria crandall. >> reporter: out of the presence of the jury, marion crandall told the court that, like carey zuck, she met tom through dar, and a couple of weeks after dar's murder, marion stopped by the farm to offer tom support. >> i don't mean to embarrass you but you had sex with tom in his living room? >> he tried to, and it was stopped. >> all right. who tried and who stopped? >> he tried, and we both stopped. >> you don't have a sexual relationship with somebody within two weeks after your wife's been murdered in that house. >> reporter: but the jury never heard marion crandall's testimony because there was no indication of a romantic relationship prior to dar's murder. the judge ruled, just as he did in the first trial, that her testimony was prejudicial and, therefore, inadmissible. it was a huge blow to the prosecution's case. they weren't this deeply in love couple that he kept trying to present. that would have proven that. >> reporter: but norris still had her two key witnesses, tom's own son heath and heath's friend sklyar wattie. both two years older and

. >> reporter: but then why was it so easy for tom to become intimate with marion crandall so soon after dar's death?? >> this is like three weeks after dar died. >> yes. >> and you're in the house where dar died? >> yeah. >> what am i to think of that? >> think that i don't care about what had just happened to my wife. that's not true. if i could go back and change it, i would. >> this was an event that involved grief and a reaching out, and it happened. >> do you love your wife? >> i love her very much. >> did you love her on february 7th, 2009? >> very much so. >> did you have anything to do with her death? >> not at all. >> reporter: before closing arguments, the prosecutor had one more card to play in the form of a surprise rebuttal witness who could unravel tom's alibi. >> please state your full name for the record. >> amber rapelje. >> reporter: out of the e esence of the jury, dar's'siece told the court that one week before dar was murdered, she went to the farm to baby-sit heath. >> she told us not to go out in the back porch without shoes because tom had dropped a frame and the