An Australian woman charged with three counts of murder on accusations of killing three members of her extended family last year pleaded not guilty Tuesday. Erin Patterson was charged in November with three counts of murder and five counts of attempted murder. The 49-year-old mother of two is accused of killing Gail and Don Patterson, the 70-year-old parents of Erin Patterson's ex-husband, Simon Patterson, and his 66-year-old aunt Heather Wilkinson ...