Susan Leibovitz

Can't help, Sarah, can't help but explain what she did.

She told Joe to pay attention to what she says and what she doesn't say and pay attention to the timing.

And like most cases on Dateline, this one is circumstantial.

There were only two people in the house when Joe's insulin dropped, Sarah and Joe.

So there are no other witnesses.

And they are not expecting any smoking gun or DNA or anything like that.

The defense said Joe administered the toxic dose of insulin himself, that he wasn't good at taking care of himself.

And that was just an example of that.

At the time of his death, Sarah was not in a normal state of mind, they said.

She had had surgery and was on narcotics.

And so she couldn't really help him.

And they said that how she handled Joe's crashing blood sugar level was not good, but it wasn't a crime.

Joe's mom was very emotional, and she testified how the couple would often argue.

They would argue about Joe and money.

In some instances, the fighting was so bad, Sarah would even lock Joe out of their house.

And she answered she wasn't surprised, that she figured something would happen to her son.

She testified that her son, towards the end, appeared fearful.

She also mentioned how Sarah told her once that she had shot and killed a man in self-defense.

And that knowledge remained in the back of her head as she worried about what would happen to her Joe.

She was.