Up next, this medical professional was obsessed with staying healthy.

Herbal supplements were a big thing. She was always trying to have everyone healthy.

But in a matter of days, what looks like a disease cuts her down.

Whatever it is just came on and it killed her.

Is she dead from natural causes or something more sinister?

This is probably the most bizarre case that I've ever worked on. Utica is so far north in New York State that it's closer to Canada than to New York City.

Locals are proud of their past, but like a lot of people in Rust Belt communities,

they face an uncertain future.

It's just a beautiful city.

It was a beautiful city.

It's not in its little hairy parts now,

but it was a beautiful city.

Bill and Mary Yoder's chiropractic business was one of the busiest in the area, which

came as no surprise to their hundreds of loyal patients.

Mary and Bill, they build up this chiropractic business and they turn it really into a family

business that everybody in Utica really looks to as this is the place to go.

The yoders had been married for nearly 40 years

and had three grown children.

On July 20, 2015, Bill had the day off while Mary worked with clients. In May

2015, Bill had the day off while Mary worked with clients.

But late that afternoon Mary got sick to her stomach,

and this didn't appear like an ordinary bug.

...