In April 2008, licensed vocational nurse Kimberly Clark Saenz committed one of the most disturbing healthcare serial killings in American history at a DaVita dialysis clinic in Lufkin, Texas. The homicide investigation connected Saenz to five patient deaths and four aggravated assaults after eyewitnesses watched her draw concentrated household bleach into syringes and inject it into active venous lines. The FBI, CDC, and FDA toxicologists used a groundbreaking forensic biomarker called 3-chlorotyrosine to confirm the poisonings, leading to a capital murder conviction in 2012.
This case has every element that makes true crime so hard to look away from. A small East Texas town. A clinic full of vulnerable patients who trusted the woman in scrubs standing over them. A nurse with a fractured past, a collapsing marriage, and an addiction nobody at work seemed to notice. And two patients sitting in dialysis chairs who looked across the room, realized what was happening, and decided to do something about it before the woman in the white coat got to them next.
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