This is the American Greek podcast presented by CNBC. I'm Stacey Kitch.

In this episode of American Greek, the spy who conned me, a devious fraudster makes the bold transition from local news.

In Missoula, I'm Garrison Courtney from Montana's news station.

To the halls of government.

The people that are here illegally in the United States looking for employment and companies exploit that routinely.

But behind the scenes, Garrison Courtney works to infiltrate the multi-billion dollar defense contracting industry with a story of working for the CIA.

He claimed that he had hundreds of confirmed kills.

Some people he claimed that was during combat for others, it was as an assassin.

Selling a lie based on patriotism, he rakes in millions.

It was going to be very lucrative. I mean, he's working to be multi-million, billion dollar contracts.

As he piles story upon story, Courtney wrapped his operation in a cloak of secrecy.

Then ropes in a bevy of high-powered dupes.

To put something together like that and to have it work the way it did.

It's mind-boggling, but it's also really impressive.

But is Courtney a real life operative? Or a fast-talking con man?

To find out American Greek, here's the story for the first time from the key players, the former colleague.

I believe that letter was a fortune.

The relentless investigator.

I've never been threatened by another government official for doing my job.

The dogged prosecutors.

How could this possibly happen if this isn't real?

And in a television exclusive, the wife, Courtney, deceived for years.

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