the house is jason duenas, and he hears nothing. karen told her the rare week of the murder that she and mark were making plans for a bright future together. and the idea that mark would kill karen so he could pursue a happily married woman from idaho he hadn t seen in more than 30 years was simply ridiculous, said the defendant. it sounds like a great motive when you look at it from a distance but then when you get to it, it sounds like puppy love. the defense rested its case in a mouths are of ours. when it went to the jury, how did you feel about that? i was pretty confident. you could see in the jury s face that they weren t buying it. then something odd happened. the day the jury went out a female juror overslept, and rather than delay the case, the judge replaced her with an alternate. and yes, on such tiny wheels, fates turned.
some teenager two or three blocks away, who said they heard a screen between 10 and 11 pm. the pathologists testified that karen could have been killed as early as 10:30. or as late as 2:30, am. the state said that it must of been 10:30. after which, mark must of washed his clothes, slash the screen to make it look like an intruder came in, then went to bed. and waited for sun, casey, to come home from the movies. one of the theories that we did have is that he wanted casey to find karen. and he sleeping peacefully, is that the idea? correct. and to cover his tracks? correct. except of course, casey did not discover the body, so mark had to make the 9-1-1 call himself. and when detectives went back and listen to that call, they heard what sounded to them like an incriminating mistake. not on wonder mckenzie? there s blood everywhere.
but as shock set in, leads poured in. witnesses reported strangers lurking. a car speeding through the neighborhood. and there were footprints out behind the house. putting alarms on every door because somebody is out there. but detectives, they decided the killer wasn t out there, but inside the house. now, with one of their own under arrest, the family was furious. you see these people, this is love. this is belief. this is human being. please listen to us. then investigators rush to judgment. do you have any idea, beyond your own fevered imaginations that happened? you don t have a clue! i think i do have a clue. was the real clear lure still out there? hello, and welcome to the line. and unexplained death can free
begonia on your own fevered and maginnis and, that s what happened? you don t have a clue. well, you know, all the evidence points to that. so, yes i think i do. it doesn t point to that. we have a person that has been in a relationship with a lady in another state. let me stop you for a minute. first of all, you said a fear. now you said being in a relationship. he was doing what millions upon millions of americans have been doing since facebook came along. if they haven t seen each other for 30 years. you wouldn t really call that a fair? here s the big difference, it becomes an affair and crosses the line when you don t tell your spouse about it. you believe that he was obsessed with this woman? i believe he wanted a lot more out of that relationship than she did. was it was a pure fiction, what was it? what else could it be? i know she s got a law degree. i never saw a psychology degree. from mark and karen sons, the prosecutor cycle analysis of their mother amo
so, means, motive, opportunity. for premeditated murder. but would a second set of jurors agree? coming up. they would want evidence, but just how much was there? do you have any idea if that s what happened? you don t have a clue. when dateline continues. [coughing] birds flyin high, you know how i feel. breeze driftin on by. if you ve been playing down your copd,. it s a new dawn, it s a new day,. .it s time to make a stand. start a new day with trelegy. .and i m feelin good. no once-daily copd medicine. has the power to treat copd in as many ways as trelegy. with three medicines in one inhaler, trelegy helps people breathe easier and improves lung function. it also helps prevent future flare-ups. trelegy won t replace a rescue inhaler for sudden breathing problems.