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New scientific evidence key to Kathleen Folbigg’s pardon after decades behind bars

Kathleen Folbigg, who spent 20 years behind bars after the deaths of her four children, has been given an unconditional pardon and released from prison after new scientific evidence emerged that provided a genetic explanation for the deaths. CNN’s John Vause talks to Anna-Maria Arabia, CEO of the Australian Academy of Science, about how the latest inquiry unfolded.