A diabetic woman accused of killing her elderly parents with her insulin told a former partner the medication was the "perfect murder weapon", a jury has heard.
Raelene Polymiadis, 65, is on trial in the South Australian Supreme Court charged with murdering Brenda and Lynton Anderson, who were both aged 94 when they died a year apart.
Opening the trial on Monday, prosecutor Michael Foundas said the "precious time" the couple had left together was deliberately cut short by their youngest daughter.
