Billy Kipkorir Chemirmir was a Kenyan-American murderer and suspected serial killer linked to a string of deaths among elderly women in North Texas. Between 2016 and 2018, he is believed to have posed as a caregiver or maintenance worker to gain access to senior living communities, where he smothered victims—often with pillows—before stealing jewelry and valuables. Though investigators connected him to more than 20 suspicious deaths, he was formally indicted on 22 capital murder counts. Ultimately, he was convicted of two murders in Dallas County and sentenced to life in prison without parole.


In September 2023, while serving his sentence in the Coffield Unit in Texas, Chemirmir was killed by his cellmate. His crimes exposed systemic flaws in how elderly deaths were classified, as many of his victims’ deaths were initially written off as natural causes, delaying recognition of his pattern. The case sparked outrage and demands for reforms in oversight of senior housing facilities and postmortem investigations, highlighting the vulnerability of elderly populations to predatory violence.

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