The source provides an extensive overview of Billy Chemirmir, a serial killer who targeted and murdered elderly women in Dallas, Texas, between 2016 and 2018. The text outlines Chemirmir’s background, an immigrant from Kenya who used his credentials as a healthcare aide to gain access to vulnerable seniors in upscale retirement communities. His modus operandi involved smothering the victims—many of whom were initially deemed to have died of natural causes—and stealing their jewelry and valuables, leading to at least 22 deaths. The source details the systemic failures in elder protection and police responsiveness that allowed the crimes to continue, the painstaking investigation spurred by a survivor, and the killer's eventual convictions and death in prison by a cellmate in 2023.

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