but it sure looked like keith griffith's car. >> and another circumstantial bit. who else but keith, the prosecutors said, could have gotten by the griffiths' aggressive great dane, cleo? certainly not an unknown intruder. >> the dog and keith were very close. a burglar couldn't have come in, a family member couldn't have. >> as for the why question, how could keith, a man who by all accounts loved his wife, actually do it? the prosecutor turned to two age-old motives. >> almost every case involving a husband and a wife, it's lust and greed. one or the other. this one had both. >> the lust part of the equation, he said, was deanna. >> raise your right hand. >> she took the stand and told the jury that not only was keith house hunting for them, he was also making plans to bring her down to paducah for a concert and introduce her to his family. >> i'd love for you to come for the weekend, stay for the weekend, we'll go to the concert and i would really like for you to meet my dad. >> as for the grieed part, that