Kathleen Folbigg: Australian mother convicted of killing her four children petitions for a pardon |

An Australian woman who was convicted of killing her four children 18 years ago has petitioned the New South Wales governor for a pardon.

Kathleen Folbigg, 53, was convicted on three charges of murder and one of manslaughter in 2003 and was sentenced to 30 years in prison.

But dozens of scientists have backed her claims that her children died from natural causes and claim she could be the victim of a tragic miscarriage of justice.