This podcast explores themes of violence, self-harm, and murder. Listener discretion is advised.

Please note some of the voices you hear in this series have been performed by actors.

It's the ultimate betrayal of trust. The very person responsible for keeping you alive, your nurse, is secretly

killing you. That's exactly what happens to patients who check in and never check out of

the Veterans Affairs Medical Center in North Hampton, Massachusetts in the 1990s.

No one would ever imagine a serial killer would be walking the hallways.

From ID and Aero Media, I'm criminal psychologist Dr. Michelle Ward, and this is Mind of a Monster,

the Killer Nurse. Chapter 1, Kristen Gilbert.

Charming nurse Kristen Gilbert stalks Ward C., praying on those who should be

most revered, are military veterans, and killing in plain sight.

Kristen Gilbert is a killer like none other I have investigated before. She sits alongside

notorious medical murderers like H.H. Holmes, Harold Shipman, and Charles Cullen.

But unlike them, she is that exceptionally rare thing, a female serial killer.

What drove her to kill? How did she evade suspicion for so long?

Over the course of six chapters, I'm going to speak with detectives, prosecutors, psychologists, doctors, and nurses to delve into the twisted mind of Kristen Gilbert and investigate just how she was able to kill right under the noses of her colleagues for so long.

Murdering four patients, attempting to murder two more,

and suspect killing dozens of others.

She was like, they're not going to catch me. I can just do this.

She's a health care serial killer, so we're entering a whole new world,

where the difference between life-saving medicine and deadly poison is just in the dosage.

We think that Kristen Gilbert is the most prolific mass murder on the East Coast.

I want to understand what makes a woman who is trained to be a nurse specifically to help the vulnerable suddenly betray patient trust and callously kill them.

...