Lester Holt

This looks very bad.

The defendant further explained his actions from the stand.

He ordered the poison for work and even took it out of the box when it arrived.

That's why his fingerprint was on the container.

Besides, his lawyer added, a man as smart as Bob Ferranti would never use a weapon that could so easily be traced back to him.

That's like me buying a shotgun, telling everybody, hey, I just bought a shotgun, and two hours later, my wife is deceased from a shotgun shot.

Couldn't be that stupid.

He would be the dumbest guy in the universe.

In closing, the defense begged the jurors to use their common sense, which they later said is exactly what they did.

Their common sense and the science presented told them Autumn Klein had died of cyanide poisoning because the defendant had given it to her.

They found him guilty of first-degree murder.

Yep.

Good description.

Robert Ferrante has since been sentenced to life in prison.

He is challenging his conviction in court.

For now, though, Autumn's family feels they've gotten justice.

Their anger towards her husband has been overshadowed by all the what-ifs.

It was all Dr. Autumn Klein had ever wanted to do, help others.

Now that chance is gone, swept away way too soon.

That's all for now.