Christopher Tapp

She understood what he apparently did not, that her son was quite possibly talking himself into very big trouble.

400 miles away in Nevada.

Ben Hobbs said he didn't kill Angie either, and he didn't know who did.

And then he asked a question.

They took blood samples from both Hobbs and Tapp.

And then they pulled Tapp in again for more questions.

Nine times.

A total of 20 hours of questions.

They polygraphed him repeatedly and eventually it came out.

A confession of sorts.

Tapp admitted he was in Angie's apartment with Ben Hobbs when Hobbs did it, killed Angie.

And with that, police were convinced they had their killers.

But sometime after all those interrogations, the DNA tests were done and results came back.

And the semen found on Angie's body did not belong to Ben Hobbs or Chris Tapp.

What went through your heads when the DNA results came back and it showed that the attacker was not Ben Hobbs?

If you're going to nail it down to one word, it's frustration.

The detectives, Brown and Furriman, were as sure as could be that Tapp knew more than he was saying.

More than even his confession.

So they kept him in jail and developed a theory to account for those negative DNA results.

There had to be a third attacker with Hobbs and Tapp.