But now to the explosive courtroom drama in kansas where a former sheriff's deputy is on trial accused of killing his wife and setting fire to their home to cover it up. The defense planning to make... See More
But now to the explosive courtroom drama in kansas where a former sheriff's deputy is on trial accused of killing his wife and setting fire to their home to cover it up. The defense planning to make the case that his wife was depressed and suicidal and he could take the stand as soon as today. Abc's paula faris has the latest for us. Reporter: This dash cam video TAKEN APRIL 30th, 2011 SHOWS THE Home of brett and vashti seacat up in flames. In the background you can hear seacat telling police his wife is inside and that she killed herself. She's dead. She shot herself. There's blood everywhere. Reporter: The seacats were a young couple with two little boys. Brett, a former police officer claims his 34-year-old wife called him that night to come get their children before they got hurt. He alleges his wife set the house on fire then shot herself. In court on tuesday, his brother robert says he saw vashti the weekend before her death and claimed she was depressed. She looked like she had lost a great deal of weight. Looked sleepy. Reporter: A private investigator hired by the defense testified he found several vials of a drug called hcg in the seacats' home. The defense says vashti was taking the drug to lose weight which has been known to have side effects leading to depression but prosecutors have painted a different story, one of bizarre behavior alleging that 37-year-old wrote his wife's suicide note, one witness says he watched seacat torching two hard drives around the time of vashti's death. A forensic scientist even finding traces of gasoline on his pants. Yet we found a gun underneath her. Reporter: The prosecution claims seacat had a clear motive to kill. Vashti served him divorce papers just two days before her death. He's being charged with first degree murder and has pled not guilty. This morning, the prosecution has rested its case. Now vashti's family wants her to rest in peace. I want a headstone on her grave. I don't think that's too much to ask to show us that respect. Reporter: For "good morning america," paula faris, abc news, new york.
This transcript has been automatically generated and may not be 100% accurate.