What If a Serial Killer Murdered Your Grandma?

Serial Killer Billy Chemirmir Reminded Us That All Deaths of Older Persons Are Not Due to Natural Causes.

Joni E. Johnston, Psy. D.
6 min readNov 16, 2021

Update: Justice sometimes comes in unexpected ways. On September 18, 2023, convicted serial killer Billy Chemirmir was murdered by his cellmate, who was serving time for murder. June 28, 2022. Billy Chemirmir was indicted today for the murders of four more women — Marilyn Bixler, Diane Delahunty, Helen Lee and Mamie Dell Miya.

“These indictments should serve as a reminder that every victim of a violent crime deserves to have their case investigated and prosecuted, and Collin County law enforcement and prosecutors will work every day to hold violent offenders accountable,” Collin County District Attorney Greg Willis said in a written statement.

Update: On April 28, 2022, a Dallas county jury found Billy Chemirmir guilty of the 2018 murder of eighty-one year old Lu Harris. The verdict was received less than an hour after jury deliberation; clearly, the jury didn’t think there was much debate about his guilt. This was a welcome relief to the prosecution who suffered through an 11–1 hung jury in 2021 in spite of the defense not having much to say. He received life in prison without the possibility of parole.

The heroines in this story are two women who have lived longer than most of us ever will. Ninety-one-year-old Mary Annis Bartell survived a brutal robbery and attempted murder in…

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Joni E. Johnston, Psy. D.

Forensic psychologist/private investigator//author of serial killer book. Passionate about victim’s rights, the psychology of true crime, and criminal justice.