
This episode of Unsolved Mysteries covers five intriguing cases: a nurse who poisoned patients, a brutal murder witness, the mysterious death of Doris Duke, a serial rapist in New York, and a businessman who vanished after scamming the government.
In Pomona, California, nurse Lette Nikita intentionally poisoned two patients with insulin to prompt an investigation for her own medical needs. After being arrested, she married a fellow inmate and later disappeared, but was eventually found and sentenced to prison.
In Florida, an eyewitness named Antonio reported a murder he witnessed in a sugarcane field, but police are still searching for him to gather more information about the case.
The episode also discusses the controversial death of Doris Duke, a wealthy heiress whose will was contested after her passing. Allegations of manipulation and potential murder surrounded her but no criminal charges were filed.
Additionally, the episode highlights the capture of Eltemio Sanchez, a serial rapist and murderer in New York, who was identified through DNA evidence after terrorizing women for years. Lastly, it recounts the story of Raymond Young, a businessman who disappeared before his sentencing for tax evasion.
This episode features a nurse's poisoning case, a murder witness, Doris Duke's death, a serial rapist, and a vanished businessman.

This episode stands out for the following:
She was playing basically Russian roulette with these people's lives.Unsolved Mysteries with Dennis Farina - Season 7, Episode 12
I love you and please forgive me for everything I have done.Unsolved Mysteries with Dennis Farina - Season 7, Episode 12
The fact that Lette is out there somewhere really scares me.Unsolved Mysteries with Dennis Farina - Season 7, Episode 12
I believe that woman wanted every chance possible to live.Unsolved Mysteries with Dennis Farina - Season 7, Episode 12
I was in tears. It was incredible.Unsolved Mysteries with Dennis Farina - Season 7, Episode 12