Joe Hunter

But there is no rewinding, says Harris.

So is this still an open case now?

No, it's closed.

Gail and Casey's experience with Joanna's case led them to create a checklist of 10 factors to be considered by law enforcement.

they had begun drafting a new law, a law that included the red flags that could signal a homicide.

Mark Lewis has not been charged with any crime relating to the death of Joanna.

After serving five years for the firebombing of Sarah Nottingham's house, he was released on parole.

He currently lives in Arizona, works for a plumbing and drain cleaning company, and has married again.

48 hours tried to reach Lewis repeatedly and received no response.

The microphone is here, powering on.

So after suiting up with hidden cameras, we decided to go in person.

With hidden cameras rolling, there was Mark Lewis.

Mark Lewis, hi.

I'm Natalie Morales with 48 Hours.

We've been trying to reach you.

We've sent you a couple of letters and correspondence.

It's okay, puppy.

Hi.

Would you be willing to speak with us on camera, sir?

No.