My mom found her. She said it looked like she might have slipped in the shower.

She was in the fetal position in this bathtub.

You could see marks on Jessica's neck.

They said, we're going to rule this as a homicide.

Detectives using new technology to view this crime scene in extreme detail.

There is no forced entry, no tool marks.

There was blood on the couch.

Who could have done this?

They say that usually it's someone close.

An investigation focusing on friends and family.

He brought up his association with a motorcycle gang.

He came off as kind of a tough guy.

We'd pull around a little bit, like teasing, sibling team, I guess you can call it.

He'd threatened to take out my whole entire family to get custody of our kids.

Wow.

A chilling story of danger and duplicity.

We were trying to figure out who did this.

He knew the whole time.

This is the ultimate betrayal.

Was the killer closer than anyone new?

I'm Lester Holt and this is Dateline.

Here is Keith Morrison with evil intent.

...