The complaint goes on to document extensive allegations of abuse by Klokow against her four children. Her son told police he remembered seeing his mother bash his mentally challenged brother's toes with a hammer.
Another one of Ruby Klokow's children -- a son -- also died in infancy. Police have exhumed that child's body as well. But she has denied killing the boy.
Through the prosecutor, James Klokow declined to be interviewed.
Ruby was arrested Tuesday and bond was set at $10,000. She will appear in court again Thursday for a preliminary hearing and will likely be arraigned the next day.
Her lawyer, Kirk Obear, who took her case pro bono, said he does not believe the prosecution has a case.
"The investigation was put on hold for 50 some odd years and then allegations come to light in an odd context," he said. "Something, somehow, came to the son based on something that happened when he was 2-years-old."
The lawyer also questioned the veracity of what the prosecution has called a confession.
"What's being called a confession is more an admission of circumstances rather than culpability," he said. "She's older, not very good at remembering details, much like any 74-year-old."