Michael Finkel

partly guilty.

He admits killing his wife and their youngest child, Madison.

But he maintains his innocence in the deaths of his older children, Zach and Sadie, confounding everyone who is following his case.

For now, the defense leaves that a mystery.

But prosecutors say the evidence is clear.

Longo alone murdered all four victims and dumped their bodies in the water.

Oregon District Attorney Josh Marquis followed the case closely.

He says Longo is a sociopath who deserves the death penalty.

At trial, truck driver Dick Ho testifies that he met a man he believes was Longo on the Waldport Bridge late one night.

Ho offered help, but was turned away.

Jurors also hear about the diver's grim discoveries, and they're shown graphic images.

5, do you recognize this?

The medical examiner says Mary Jane and Madison were strangled, but he cannot determine how Zach and Sadie died.

It was those photos, especially like the bruises that... Finkel is disgusted, both with Longo and his own bad judgment.

Did you feel duped by him?

Suckered in?

In his defense, Longo takes the stand and tells the same life story he rehearsed on Finkel.

his downward spiral, his excuses for stealing and lying.

Up until the trial, when Longo told his story, he stopped just short of revealing how and why his family was murdered.

But now in court, he finally continues.