Billy Kipkorir Chemirmir was born on December 8, 1972, in Eldama Ravine, Kenya. He emigrated to the United States in 2003, gaining permanent residency and working as a caregiver in North Texas.

Quiet and helpful in Kenya, he soon cut ties with family, working also briefly as a car salesman. His criminal actions began when he used caregiving access to enter elderly victims’ homes.

He impersonated medical or maintenance staff, smothered the vulnerable women—often with a pillow—and stole their jewelry.

From May 2016 to March 2018, Chemirmir was linked to at least two dozen elder deaths—22 formal indictments, 2 convictions, 20+ suspected victims.

The attacks spanned Dallas, Plano, Frisco, Richardson—places trusted by seniors. Pillows bore lipstick blood stains; jewelry vanished; most deaths were misclassified as natural.

Many families felt shocked. One daughter said her mother had been thought to die naturally—only later did police call to say, “Mama… was murdered,” she recalled, “I am floored”. AARP insight noted failure of age bias—confidence that such deaths weren’t suspicious—and the killer exploited that gap.

In March 2018, 91-year-old Mary Annis Bartel survived an attack after being smothered—then regained consciousness. Her report led to Chemirmir’s arrest on March 20. Police recovered jewelry in a dumpster linking him to Lu Thi Harris, found dead that same evening.

Multiple capital murder indictments followed. The first trial (for Lu Thi Harris) ended in a mistrial in November 2021 due to a hung jury.

Retrial began in April 2022; Chemirmir was convicted of Harris’s murder and sentenced to life without parole. In October 2022, he was convicted of murdering 87-year-old Mary Brooks, again sentenced to life.

Prosecutors in both Dallas and Collin counties opted not to seek the death penalty. Remaining charges were later dropped, which many victims’ families found deeply frustrating.

Chemirmir was killed by his cellmate on September 19, 2023, at the Coffield Unit in Tennessee Colony, Texas. The assault, reportedly by stabbing with an edged weapon, caused fatal injuries.

A recent YouTube exposé titled “The Secret Grave of Billy Kipkorir Chemirmir” unveiled a secret burial site that authorities exhumed to probe potential links to additional victims. The covert gravesite—reported earlier—hints at unresolved question marks in a case already steeped in fear and loss.

Chemirmir’s case exposed systemic flaws in elder care and law enforcement—particularly how age bias led to misclassification of murder Victims. Families formed advocacy groups like Secure Our Seniors’ Safety (SOSS), urging legislative action to improve security in senior residences Texas True Crime Blog. His saga prompted new scrutiny, policy talk, and a reckoning within vulnerable communities.

Billy Kipkorir Chemirmir’s story is one of betrayal—a trusted caregiver who preyed on the most vulnerable. His secret grave symbolizes the victims still unaccounted for, the loved ones still demanding justice, and the broader societal failure toward the elderly. Yet, through tragedy, awareness and advocacy bloom.

The fight to protect seniors, to recognize signs of danger—even when hidden—continues. This guide offers a full map for those seeking to understand that dark chapter—and ensure it never repeats.