The NSW Attorney-General has ordered a second inquiry into Kathleen Folbigg’s convictions for killing her four children.

Ms Folbigg was convicted in 2003, with murdering three of her children, and the manslaughter of a fourth.

But supporters remain hopeful, she’ll be cleared on the basis of new scientific evidence. 

Ms Folbigg’s lawyers are requesting a pardon, with many researchers arguing, at least her two daughters’ deaths can be explained by a genetic mutation.

Supporter and friend Helen Cummings says the justice system needs to listen to the science.

“These were eminent scientists, four Nobel Laureates, 150 of them around the world,” Ms Cummings said.

“If the law cannot accept their evidence into these sorts of cases, and has to push to so hard to say, you know, we’re even willing for these experts to brief you.” 

Attorney-General Mark Speakman made the announcement on Wednesday afternoon, saying the evidence needs to be tested, before a pardon is issued.   

It’s understood, a pardon alone would not have cleared Ms Folbigg’s convictions.

Ms Folbigg will be eligible for parole in 2028, after serving 25 years of her 30 year sentence.

Ms Cummings says she’s hoping it’s the end to a painful story.

“There are two parents in this whole saga, and you know unfortunately this is going to show possibly the worst miscarriage of justice in the world, that’s how it’s going to end up,” Ms Cummings said.

“It’s sad for Kathleen, she’s still in prison, she shouldn’t be.

“I mean, what is prison about? Are we protecting society from Kathleen? It’s still punishing her, it’s very wrong.

“I hope this is fast, and she can clear her name.”