sentences:  In 1997, Arnott's Biscuits was subject to an extortion bid by Queenslander Joy Ellen Thomas, aged 72 years, who allegedly threatened to poison packets of Arnott's Monte Carlo biscuits in South Australia and Victoria.The company conducted a massive recall and publicity campaign, publishing the extortionist's threats and demands in full-page newspaper ads.However, Ms. Thomas was not charged with any offence as the prosecution dropped the case against her because of conflicting evidence.