Kathleen Folbigg: how genetics could lead to a pardon for 'Australia's worst female serial killer'

She has always maintained her four children died of natural causes. Now 90 scientists argue she may be right

Leading scientific experts are petitioning for the pardon of the woman dubbed Australia's worst female serial killer, arguing that all four of her children had rare genetic conditions that could explain their deaths.

Kathleen Folbigg is in jail for killing her children as infants between 1990 and 1999.