For Better or Worse, or Poison? Also: Who Killed Imette? - Recap

Everyday people who think that murdering someone is a viable option to problems they’re having with them are profiled in tonight’s investigation. Dateline looks back at previous stories as well as examines a more than year’s worth of hidden surveillance tapes that expose a town hero, a Houston area firefighter, attempting to poison his wife of more than three decades.
In an in-depth interview with this man (Richard Thomas) he explains why he did it, what he was thinking and apparently wasn’t thinking. Adding to the intrigue and surprising twists that are becoming typical of Dateline, the other people interviewed (we aren’t naming them at this time) make it a jaw-dropping episode.
In another story tonight, the question is raised about how young Imette St. Guillen, a criminology student, could leave a crowded Manhattan bar and disappear into the late night. Her body was found the next night, bound, strangled and dumped. She apparently died a horrific death. If a criminologist could ever be used, it’s for this devastating case. Of course, you, the public, may provide the most valuable clues.