Up next, a triple homicide shocks a small town.

There's three great guys and they're gone and nobody knows what. The crime scene has

some unusual evidence but detectives still can't identify a suspect. It was very

stunning a bit of a shockwave a lot of speculation on what had happened, why it

happened, who could have done it. The killer leaves an odd clue behind and it

proves a dog can sometimes be a homicide investigator's best friend.

We would have never in a million years thought that it was dog feces that was going to lead

us where we needed to go. With a population of fewer than a thousand people, Lakeville, Indiana is classic rural America.

I grew up there. It's a small town where families are intertwined and we know each other and we've all grown up together.

Just a very safe and comforting place to be.

But Lakeville is only a few hours drive from Detroit and from Chicago.

So in recent years this small town has seen some big city problems.

Over the years the violent crime has slowly increased and has gotten bad.

We again are no different than any other city throughout the country that has a gang problem and drug problems.

On a September afternoon in 2000, a contractor went to check in with three coworkers who were doing renovations at a large upscale property on the outskirts of town.

What he found continues to shock Lakeville residents to this day.

His coworkers were dead.

All three were laying side by side on the floor of an outbuilding, a barn.

They had been shot, point blank, in the head.

We're looking at three bodies, hands duct tape behind them, appearing to have been executed.

My brother called to say that dad had been shot, and I figured he was maybe out on a tractor in the field

or doing some work for my cousin.

...