BY OLIVIA DILLON
The inquiry into the convictions of Singleton mother Kathleen Folbigg has heard there is reasonable doubt of her guilt.
The 55-year-old was gaoled in 2003 over the deaths of her four children.
However, the enquiry has heard today there is a strong plausible case for each child's death, including a rare genetic mutation found in two of Folbigg's daughters.
It's also been submitted, her son Patrick may have died from an underlying neurogenetic disorder such as epilepsy.
In addition, it's possible explanations for the deaths of those three children, could undermine the tendency reasoning used to convict Folbigg of her son Caleb's manslaughter.
The hearing has also heard evidence suggests it would be unreliable to interpret some of her diary entries as submissions of guilt.
If reasonable doubt is found when closing submissions end, the case could be referred to the Court of Criminal Appeal, which may quash Folbigg's convictions.