A young suburban couple gunned down on their front porch.

People heard things they described as fireworks in the middle of the night.

It looked like it was some kind of a gunfight.

At the crime scene, there's another shocking discovery.

I was very tense.

We didn't know if there was more victims.

Evidence suggests they knew an attack might be coming.

There was a loaded shotgun behind the door.

That told me they thought that they needed some kind of protection.

Uncovering the truth behind the brutal slayings reveals a killer hell-bent on revenge.

I don't think she liked the fact that he was happy without her.

It was the straw that broke the camel's back.

When police are ready to move on their suspects, they completely vanish.

They then cut and dyed their hair.

They were trying to disappear.

No one knew where they were at.

Nobody knew what they might do next.

So we were on high order. Willard, Missouri is a quiet residential area 12 miles outside Springfield.

But at 9 a.m. on November 14, 2020, this normally peaceful town is shaken by a horrifying discovery.

9-1-1 dispatch received a call from a neighbor.

She said that she looked through her window while she was serving breakfast to her family.

And she seen her neighbors laying down on the ground,

...