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Serial killer mum convicted of killing her four kids could be innocent, scientists claim
serial killer jailed for murdering her four babies could be innocent, scientists say.Experts are backing the claim the tragic tots could have died of natural causes rather than been killed by their mum Kathleen Folbigg.She is one of Australia's worst serial killers but a growing number of scientists say the 53-year-old could be the victim of a miscarriage of justice.Folbigg, who was sentenced to 40 years in prison in 2003, has now petitioned the New South Wales state governor for a pardon "based on significant positive evidence of natural causes of death" in all four cases. She was convicted of murdering Patrick Allen, eight months, Sarah Kathleen, 10 months, and Laura Elizabeth, 19 months.