Toni Hartzong

Thank you.

But Gagnon's DNA was not found at the crime scene, and he was dismissed as a suspect.

Who killed Tony Hartson?

We don't know, and we'll never know.

While the lawyers offer different explanations of the evidence and different theories about how Tony was killed here at our home in Jupiter, one big question continues to hang over the entire case.

If Bob Hartzong did kill Tony, what was his motive?

It's greed to me is what it is.

Investigators think Bob's motive was mercenary.

They speculate he was planning to divorce Tony and didn't want to pay for it.

But Barry Sorin believes Bob's motive was years in the making.

He's married.

What do you mean?

Marriage is the motive.

People are married, they have a thousand insults, a thousand things that happen in a marriage, a thousand hurts.

If you're not careful and you don't have a good core morality after 27 years, people lose it.

But in court, the prosecution has no clear-cut motive to offer.

And the jury is about to hear from one last witness who knows more than anyone about Bob and Toni Hartsong's marriage.

Please introduce yourself to the members of the jury.

Their son, Jake.

Me and my mom, she was like my best friend, like...