Blaine Alexander

And as it turned out, since the very beginning, Rebecca had been at the top of nearly everyone's suspect list.

For Carter Schwartz, it's impossible to look at this stunning house and feel anything but sadness.

On the Anclode River in front of his dad's old home, Carter talked about his father's murder and the man accused of killing him, Leo Straugai.

You said that you believe that police partially got it right.

Carter believes someone else either killed his dad, orchestrated the murder, or both.

That person, he says, was his stepmother, Rebecca.

In Carter's mind, it came down to one reason, money.

Rebecca knew she would inherit every dime of her husband's millions.

He says Rebecca was secretly spending a fortune on her two sons, Ben and Eric, paying for their lavish weddings and buying them homes worth hundreds of thousands of dollars.

So about a year before his dad's death, Carter and his wife did their own investigation.

You've got literal receipts showing him this.

Never told me what he did about it.

Carter pleaded with his dad to get a financial expert and figure out what was going on.

So he said, why waste the time trying to chase it down?

I told him, I said, Dad, you got to leave.

He didn't give me an answer one way or another.

So you told him, you've got to divorce this woman.

Yeah.

Detective Diebel discovered that along with buying her son's homes and paying for their weddings, Rebecca had given her sons hundreds of thousands of dollars more to start their own businesses.

When you say moving money...