Brett Seacat Trial in Hands of Jury

Former Kansas cop accused of killing his wife says she committed suicide.
3:59 | 06/11/13

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Transcript for Brett Seacat Trial in Hands of Jury
First, we get to the latest in the trial of former kansas cop, brett seacat, accused of shooting his estranged wife and setting the house on fire. It's now in the hands of the jury. Paula faris has the latest. Reporter: Brett seacat repeatedly shook his head in disapproval in court monday, as prosecutors argued he should spend the rest of his life behind bars. The defendant is controlling. He is manipulative. And you know what else he is? He's guilty. Reporter: This morning, jurors will decide if they agree. Seacat is charged with shooting and killing his wife, vashti, as she lay sleeping in their kansas home two years ago. Prosecutors say he burned down their house, but not before pulling thur ypu pulling their young boys to safety. She shot herself. There's blood everywhere. Reporter: Seacat told the officers on the scene his wife committed suicide and set the house on fire. Saying he ran through the flames to pick her up. But monday, prosecutors told jurors to compare seacat's story of running through fire with the way he looked. The burns that he does have, basically, minor blister on his left foot. Now, we're going to switch to his right foot. It doesn't show any burns. Reporter: Defense attorneys say seacat's wife had been indecisive about the couple's pending divorce and was severely depress, a side-effect of the weight loss drug hcg, leading her to kill herself. If it causes depression and you already have depression, gee, I wonder what happens. Wouldn't probably make it any better. Reporter: The coroner was unable to determine if vashti seacat's death was murder or suicide. Brett seacat had maintained his innocence. But this morning, it's up to a jury to decide. For "good morning america," paula faris, abc news, new york. Let's get more from "gma" legal analyst, dan abrams. The prosecution put on such a strong case. But seacat took the stand. I guess he had no choice, right? He held up. He held up on cross-examination. He offered his account of this. And he really may have implemented a tough case. He may have created a tough case here. Look, there were a number of things he's admitting to doing. He admitted to threatening her, but not in the way the prosecution is saying. He says, yes, we were getting divorced. And I was threatening to expose embarrassing photographs of her. I was threatening to embarrass her at work and to talk about her having affairs. But not with regard to threatening to kill her. And his whole job here is to plant some kind of seed of doubt. If 12 people were put in a room and said, do you think it's likely brett seacat killed his wife, after listening to all of the evidence? I'm confident that you could find 12 people where the answer would be yes. The question here isn't that. The question is, is there proof beyond a reasonable doubt? That's when the jurors start nit-picking. That's when they go into each and every pose of evidence and say to themselves, well, yeah, but. Casey anthony. Casey anthony. We've seen other cases like it. And when you have a specific theory here, as the defense has, which is this was suicide, and you have a suicide note, right? Which the prosecution says he created. But if these jurors, at least some of them question whether she actually could have written that suicide note, that could be reasonable doubt, at least for a few jurors. You think he helped himself. I think he had to take the stand in connection with this case. I think there was no real downside, considering that he is a former police officer. He knows what to say and how to say it. And I think he did a pretty good job on the witness stand. The reason this is going to be a close case is only because of reasonable doubt. Dan abrams, thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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