Christopher Tapp

He is Steve Drizzen, a clinical professor of law at Northwestern University, legal director of the Center on Wrongful Convictions and one of the world's leading experts on the phenomenon of false confessions.

When that Dateline program about the case aired, Drizzen had been watching.

I had seen the Dateline show, so I was aware of...

And I almost fell out of my chair.

It's hard to get your head around that in a way, isn't it?

It is extremely unusual that a victim's family member would reach out to me.

And when he watched those hours and hours of Chris Tapp's interrogation tapes...

It was all a ruse.

Well, now that would shake things up, thought Chris Tapp's public defender, John Thomas.

Wouldn't it?

So with that, you know, world-leading false confession expert, did the police attitude begin to change?

So Drizzen got the National Innocence Project involved.

And while progress was not immediate, things began to happen.

For one thing, this woman was having a change of heart.

Remember Destiny Osborne?

One of the river kids?

So that little knot of uncomfortable stuff was working away inside you.

It's a big knot.

A knot in her stomach.

Cause, Destiny, who testified at Tapp's trial and told the jury that she had heard him confess to the crime...