I'm Cheryl McCollum, host of the brand new co-case podcast, Zone 7.

We're going to be talking to family members, detectives, prosecutors, and nationally recognized

experts that are in my Zone 7. The group of professionals that I've called on

to help me work hundreds of cases you've heard of and thousands you haven't.

We are going to solve these cases own air together. Listen to Zone 7 on the I Heart Radio app,

the Apple Podcast app or wherever you listen to your favorite podcast.

This is a special episode of Crime Stories with Nancy Grace,

Finding Chase Masner, Episode 4.

This week marks three years since her son, Chase Masner, vanished in Cork County.

Living the last three years with the not knowing and without him here is pure help.

Chase Masner is an Iraq war veteran, a husband, a father.

As White told us, she dropped them off at a quicksup in Cobb Towne where he works.

His family says he was last seen at their friends house in Kennisau three years ago on March 27th.

It's like he vanished from that home not to be seen or heard from again.

If he was able to reach out to any one of us, he would be would.

Despite some intense searching, due clues have been found.

She tells me that as a mother in her heart, she feels her son, Chase, is dead.

We have absolutely no answers to that.

Not even slightest clue in three years.

We're back at square one, Stephanie, because we have to talk to Brad.

That's the missing link here.

Now we know he's refused to polygraph and then stated again he will take polygraph.

...