Linda Zapata

And 30 years after the case began, Kaiser ordered police to arrest Eugene Zapata.

And Linda's father was charged with murdering her mother.

On September 4th, 2007, Eugene Zapata went on trial for first degree murder.

Once again, Linda Zapata would play a major role in the case against her father.

What did you ask him?

I said, where's mom?

She became the first witness for the prosecution.

What did he say?

He said, she's probably stressed with a divorce, she probably needs a vacation, and she'll probably be back in a couple weeks, two weeks.

The judge ruled testimony about what the dogs found was unreliable and threw it out.

So prosecutors had to rely on evidence of Eugene's movements and those notes he tried so hard to conceal.

Zapata's one big mistake, argues the prosecution, was answering the phone on the morning of October 11th, 1976, a morning he was barred by court order from being at the house.

When you have just murdered your wife and you're not supposed to be in the home to begin with, don't answer the phone.

That should be murder 101.

Don't answer the phone.

You will leave this case with questions.

You will leave with perhaps suspicions and much uncertainty.

It takes the defense less than one hour to present their case.

They argue that the prosecution failed to connect Eugene Zapata to any crime.

Zapata never talked in court and he never talked to us.