Elizabeth Vargas

And I'm Elizabeth Vargas. And this is 2020.

And I'm Elizabeth Vargas. And this is 2020.

In a race against time, 38-year-old Thomas Bart Whitaker's final days are ticking down on Death Row. Now he awaits a destiny that seems all but assured, execution by lethal injection. His father Kent spends these final days in a desperate hunt for mercy. On this day, savoring what may be his last visit with his son in prison.

In a race against time, 38-year-old Thomas Bart Whitaker's final days are ticking down on Death Row. Now he awaits a destiny that seems all but assured, execution by lethal injection. His father Kent spends these final days in a desperate hunt for mercy. On this day, savoring what may be his last visit with his son in prison.

In Texas, a state that executes more prisoners than any other in America, Kentz is a fierce battle against the odds. His love tested by a terrible twist of fate. The son he is defending plotted the murders of his wife and his other son.

In Texas, a state that executes more prisoners than any other in America, Kentz is a fierce battle against the odds. His love tested by a terrible twist of fate. The son he is defending plotted the murders of his wife and his other son.

The Whitaker story began here in Sugar Land, Texas, where the sweet smell of success brought them everything they desired. It was the sugar industry that transformed this suburban backwater into one of the wealthiest towns in Texas.

The Whitaker story began here in Sugar Land, Texas, where the sweet smell of success brought them everything they desired. It was the sugar industry that transformed this suburban backwater into one of the wealthiest towns in Texas.

You're back in line, you little nerd. The Whitaker family videos paint a warm picture of a loving, prosperous home.

You're back in line, you little nerd. The Whitaker family videos paint a warm picture of a loving, prosperous home.

Tricia is a former teacher turned full-time mom.

Tricia is a former teacher turned full-time mom.

Every moment seems picture perfect.

Every moment seems picture perfect.

But who could imagine that inside that adorable little boy was a ticking time bomb of rage. What was your relationship like with your parents?

But who could imagine that inside that adorable little boy was a ticking time bomb of rage. What was your relationship like with your parents?

We first met Bart Whitaker in 2009 when Bart spoke to former ABC News correspondent Mary Fulginiti about his strange and violent journey. Your family tried to love you.

We first met Bart Whitaker in 2009 when Bart spoke to former ABC News correspondent Mary Fulginiti about his strange and violent journey. Your family tried to love you.

Hey, Bart, drive down the street to the stop sign for me. Bart's bond with his father, Kent, was especially close. From the moment Bart learned to ride a two-wheeler, he and his father shared a passion for biking.

Hey, Bart, drive down the street to the stop sign for me. Bart's bond with his father, Kent, was especially close. From the moment Bart learned to ride a two-wheeler, he and his father shared a passion for biking.