Michael Finkel

Detective Trish Miller caught the call when the first victim was found floating near the bridge.

He was perfectly groomed.

He had a really good haircut.

The Lincoln County Sheriff released this picture to the local news, hoping to identify the dead boy.

I thought, oh, God, that can't be, you know.

That can't be Zachary.

Denise Thompson had babysat Zachary Longo and his two little sisters, Sadie and Madison.

She knew their father, Chris Longo, from the local Starbucks where they both worked.

I thought, well, you know, this can't be happening.

By the time Denise got to the police station, the second body had been found.

A little girl weighted down with a rock.

Denise identified them both, Zachary and Sadie.

You never want to be in that position to see a little child.

As police hunted for Chris, his wife Mary Jane, and their baby... We're actually trying to locate them.

They may well be victims.

Denise remembered a strange conversation she'd had with Longo the very day Zach's body had been found.

He made it a point to come up to me while I was working and said, you won't be seeing the rest of the family.

My wife and I are getting a divorce.

Were you shocked?

Oh, yeah.