Tom Bevel is a former Oklahoma City homicide detective hired by Kari's family as a crime scene analyst. Bevel says paramedics told him that lividity, a reddish rash that normally forms an hour to three hours after death, was just forming on Kari's body when they arrived. He says this indicates that Kari must have died long before Matt left the house for a movie.
Bevel points to other red flags like the locked bedroom door and the typed suicide note, which are rare in suicide cases. He also finds it suspicious that the first thing Matt did before calling 911 or attempting CPR was to try and put Kari's clothes back on.
"I knew my wife well enough, that would've been embarrassing for her. I did not want the EMTs to come in and see her naked," Matt said.
Although there is a lot of circumstantial evidence, the biggest roadblock to a conviction is answering how did Kari die?
The prosecution's theory is that Matt drugged Kari with sleeping pills and then suffocated her with a pillow. In an autopsy performed months after Kari's death, there was no sign of sleeping pills in her stomach. There was, however, evidence of sleeping pills found in her tissues, though that does not determine how many sleeping pills she actually took. The autopsy also failed to reveal any evidence of suffocation or choking.
"I think it is something that in our society, we hang that hat with the jury and let them look at all of the physical evidence that is there, those issues that you're bringing up and it is up to them to make that decision," said Bevel.
When asked, Matt repeatedly denies killing his wife.
"I loved her. She's the mother of my children," Matt said. "We struggled after the death of our child and like every marriage you have your ups and your downs, you have your good days and your bad days. But I loved her and I miss her and I did not hurt my wife."