Lester Holt

That would be correct.

Coming up, was jealousy a possible motive for murder?

What had Bob Ferrante discovered about his wife?

When Dateline continues.

Dr. Autumn Klein and Robert Ferranti had all the trappings of success and happiness.

A nice three-story home, a short drive from the heart of the city, prestigious jobs at the University of Pittsburgh and its medical center.

At one time, it all seemed enviable.

Did you think they were a good couple?

Yeah.

And then it all went so wrong.

Autumn, dead from apparent cyanide poisoning.

Her husband now, a year and a half later, standing trial for her murder.

Even to the presiding judge, with years on the bench, this was a first.

You had a very intelligent man who's accused of poisoning his wife.

You have experts who argue with one another.

And tip-top good lawyering.

Very good lawyering, very good experts.

And it would be up to prosecutor Lisa Pellegrini to explain what drove an otherwise mild-mannered scientist to kill the wife he supposedly loved, and in such a cruel manner.

She opened by describing a man infuriated, one losing control of his more successful wife, who had in turn grown tired of him.

Alan Jennings in the courthouse.