David Muir

What we inferred from the crime scene was somebody had done this before.

We stored the DNA in hopes that science would eventually catch up.

They now realized they were dealing with a serial killer, and it covered a much bigger area than they had ever imagined.

It was frustrating for them.

It seemed like such a big development.

How could they not find this guy?

After we exhausted all those leads, we didn't know exactly where we were going to go from there.

In 2013, the Memphis Police Department did an inventory of all of their sexual assault kits.

The Memphis Police Department found that 6,179 needed DNA testing.

And in May of 2017, a third CODIS hit matched the crimes in Greenville, South Carolina and Portageville, Missouri.

There was nothing substantial to go on that would help us find out who he was.

Brian Pata, senior defensive lineman from Miami.

Gunned down.

The key to this case, it's Brian.

A hour before he died, he was on the phone arguing with somebody.

This might be a hit.

You want the truth.

They just want a conviction.

In place under arrest.

We had a killer amongst us.