Psychiatric care for woman who killed

A Sydney woman charged with the stabbing murder of her father and sister has been found not guilty by reason of mental illness.

The 26-year-old woman, who cannot be named for legal reasons, was charged with killing her father and sister at their Revesby home in July last year.

She was also charged with inflicting grievous bodily harm on her mother.

The court previously heard the woman was denied treatment for schizophrenia because of her father's beliefs in Scientology.

Justice Michael Grove has found her not guilty by reason of mental illness.

She will be kept under psychiatric care in hospital until further directions from the Mental Health Review Tribunal.