Craig Folbigg, whose ex-wife Kathleen Folbigg spent 20 years in jail before being acquitted of killing their four children, has died.
Mr Folbigg suffered a heart attack last Friday and died at Maitland Hospital yesterday. It is understood he was also suffering from cancer.
Until his death, he maintained his children were killed by his former partner, despite her being exonerated last year.
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Ms Folbigg had been convicted of killing their children Patrick, Sarah and Laura and of the manslaughter of their firstborn, Caleb, between 1989 and 1999, when they were aged between 19 days and 19 months.
Prosecutors in the 2003 trial argued Ms Folbigg smothered her children during periods of frustration and asserted that some of her diary entries were admissions of guilt.
Mr Folbigg also gave evidence against his former partner.
But in June 2023, after new scientific evidence raised doubts over the guilty verdict, she was pardoned and released.
Then, in December of the same year, Ms Folbigg had her convictions quashed by the NSW Court of Criminal Appeal after two decades behind bars.
Despite this acquittal, Mr Folbigg died believing his children were killed by his ex-wife.
"Craig is a shattered man, and his views have not changed about what occurred with his four children," his lawyer Danny Eid said in June last year.
Ms Folbigg has released a statement in the wake of her ex-husband's death.
"There were only two people on this earth who knew what it felt like to lose Caleb, Patrick, Sarah and Laura," it read.
"My condolences go to the loved ones Craig leaves behind."