Kathleen Folbigg, an Australian mother wrongfully convicted of murdering her four children, was released from prison on Monday after receiving an unconditional pardon from the New South Wales Governor. Dozens of scientists from Australia and abroad had signed a petition calling for her release, citing new scientific evidence that supported her claim of natural causes for the deaths. The pardon was seen as the quickest way to free Folbigg, and her case has raised questions about the reliability of scientific evidence in criminal cases.