Kathleen Folbigg pardoned after 20 years in prison.

Kathleen Folbigg, dubbed "Australia's worst mother", has been pardoned of killing her four children after 20 years in prison. The decision follows one of the worst miscarriages of justice in Australian history, her lawyers say, and it has held up a microscope to what experts call "demonstrably unreliable and misogynistic" evidence that helped convict her in 2003. A fresh inquiry concluded there was reasonable doubt over Ms Folbigg's guilt, due to new scientific evidence that her children could have died of natural causes because of incredibly rare gene mutations.