An exceptionally rare genetic variant shared by Kathleen Folbigg and her two daughters may have contributed to the deaths of the children, a judicial inquiry has heard.
Lawyers for Kathleen Folbigg, who has been convicted of the deaths of her four infant children between 20 February 1989 and 1 March 1999, said that if the variant was a factor in the deaths of her daughters it would create reasonable doubt in relation to the other two cases.
