Beth Dutton

And I was devastated.

But there was one clue that caused investigators to question the grieving widow.

A blanket found wrapped around her dead husband's torso was the very same kind of blanket used at the fertility clinic where Melanie McGuire worked.

I just have to try to go on.

Hi, this is Jill Schlesinger, CBS News business analyst, certified financial planner, and the host of the Jill on Money podcast.

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Melanie McGuire says she was devastated by her husband Bill's death.

What is the last thing that you remember saying to Bill?

You'd have to edit it.

Give me the gist.

F you.

That's the last thing you said to him?

And I have to live with that.

Bill's sister, Cindy, refuses to believe that Bill had been violent with Melanie.

I know my brother.

He would never lay a hand on a woman.

You never saw him abuse her?

No.