This is the 2020 True Crime Vault.

Most people would call the police if they found their husband dead on the floor in their living room.

What I did was absolutely horrible, but it's the absolute truth.

She's in prison from murdering her husband.

But she swears she's innocent.

They look like a slightly struggling, but optimistic young couple.

Mike, up at the Air Force Base, Wendy building her new veterinary practice.

At what point did this apparent dream life sour and why?

Michael said that his marriage was rocky and that he was thinking about getting out.

It was on this ranch that police found a decomposing body,

believed to be that of 24-year-old Dias Staff Sergeant Michael Severance.

Michael Severance survived five tours of duty in the Middle East, but he did not survive five months of marriage to Wendy Davidson.

He was telling her that he had a secret mission he was going on.

I said Wendy.

That man hasn't got, that's enough to pour piss out of the boot.

You can't make this stuff up.

Like Dean Coombs couldn't make this up.

How is it that a wife finds the only way to get rid of a husband is through murder?

It doesn't sound right. It doesn't feel right. I did not kill home. We all know that Wendy's a pathological liar. Who killed Mike Severance if it wasn't her.

I'm traveling to the Gatesville Correctional facility about an hour west of Waco.

I'm there to meet Wendy Mae Davidson, the former veterinarian, current convicted murderer.

From day one, she has insisted she wasn't responsible for the death of her husband,

...