A woman allegedly kills her fifth husband. A hookah bar owner on trial again. Plus, a Dateline LIVE preview

In Texas, a woman accused of poisoning her fifth husband is gearing up for trial next week. A California hookah lounge owner was found guilty of murdering his girlfriend over a decade ago, but the conviction was overturned. Now, he's getting a new trial. Updates in the Karen Read and Rex Heuermann cases. Plus, the Dateline correspondents are hitting the stage live in Nashville this weekend, and we've got a preview.