Barbara Eckersley is due to be sentenced on Thursday at the NSW Supreme Court, sitting in Goulburn.
A jury last month found the 69-year-old unlawfully killed Mary White, her non-verbal, frail mother by lacing her food with a drug known as green dream .
Eckersley was found guilty of manslaughter, not murder, over the 2018 death.
Eckersley denied murdering her mother (pictured), a renowned scientist who had severe dementia and other health conditions
Ms White, 92, a renowned environmental scientist, had severe dementia and other health conditions, having suffered a stroke in 2016.
She died two days before she was due to move out of the nursing home in Bundanoon in the NSW Southern Highlands to another facility in Coffs Harbour, closer to family.
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