Cecil Douglas Walker, who has been charged with the Aug. 27 stabbing death of his 86-year-old mother in Black Diamond, will be evaluated to determine his competency to stand trial.

According to King County Prosecutor’s Office spokesman Dan Donohue, the prosecutor asked for a mental evaluation of Walker at the King County Superior Court arraignment hearing Tuesday in the Norm Maleng Regional Justice Center. Walker is next scheduled to appear in court Sept. 30 for a competency/arraignment hearing.

The prosecutor has charged Walker with first-degree murder, domestic violence. His bail is set at $1 million and he remains in custody.

The 50-year-old Walker is accused of using a knife – with a blade of approximately 12 inches – to kill his mother, Ella May Walker, while she sat in a recliner at the Black Diamond home they shared.

According to the probable cause report issued by the Black Diamond Police Department, the King County Medical Examiner reported Ella Walker was stabbed multiple times and there was “blunt force trauma” to her face.

At least three family members told investigators Ella Walker had asked her son to move out of her house.

One provided more detail, stating that Ella Walker had asked her son to move out and he “become upset and he began breaking items in the house.”

Another family member reported Ella Walker said during a phone conversation about noon the day of her death, she had asked her son to move. The report stated the family member “indicated Ella started to cry and then disclosed that she had again asked the defendant to move out of her house.”

One relative indicated Cecil Walker used methamphetamine and marijuana and two family members told investigators he had threatened to kill them.

One family member stated Cecil Walker had a large knife in his downstairs bedroom that Ella Walker had found.

Another stated Cecil Walker had “numerous psychiatric evaluations; the latest evaluation as recent as last month.”