Nick Kasotis

But if Mindy had died at a Savannah clinic, how did her remains end up in a swamp?

Nick told detectives he had no idea, but insisted he didn't do it.

What Nick didn't know at the time was that detectives were already building a case against him.

For starters, when detectives ran a background check on Nick, they discovered he owned a green Ford Explorer, a green Ford Explorer that looked just like the vehicle investigators had spotted on a surveillance video from a remote pumping station near the crime scene.

And why was that camera so significant in this case?

Because it captured Nicholas Kasotis' Explorer driving past it, going in and out of that area.

And that wasn't all.

On a hunch, days after Frost had processed the crime scene, he checked with Home Depot stores, which sold that Milwaukee brand of knife.

Agent Frost had contacted Home Depot because he had worked another case and was familiar with the brand.

One of those knives had been purchased from a store just 50 minutes from the hunting club with a debit card belonging to Nick Kasotis.

Here's a surveillance photo of Nicholas Kasotis right after he paid for that knife.

There he is.

And you can see the knife right under his arm.

And there were more knives.

When Frost had checked out a Bass Pro Shop in Savannah, he discovered that Kasotis had also used his debit card there and bought a knife kit designed for hunters.

Oh my God.

I'm not touching this.

These are very sharp.

Very sharp.

And then there is also a bone saw.