She was hired to nurse them back to health...instead, she took their lives.

For months, the DaVita Dialysis Center in Lufkin, Texas had been baffled by the rising number of deaths and injuries occurring in their clinic. In April alone, they’d rushed thirty-four patients to the hospital. But no one expected such a horrific cause to be behind it all.

Kimberly Clark Saenz was a well-liked licensed vocational nurse at the center. The East Texas nurse was a mother of two, and known for her smiles and the stories she told to help patients pass the time. But on April 28, 2008, witnesses came forward to say that instead of lifesaving medication, they’d seen Saenz adding toxic bleach to IV ports. Turns out, it wasn’t the first time. Once caught, the shocking story of Saenz’s murderous practices began to unravel…