Two more people have been charged with stabbing a Springfield man to death on Christmas eve. The latest are Jeffrey Williamson and his mother. Williamson, who is 17, is charged with second degree murder. His mother, Kathryn Stafford, is charged with hindering prosecution by helping her son flee from Missouri. He surrendered to authorities in New Mexico over the weekend when he found out his mother was in jail. Last week, Eugene Claypool Junior, was charged in the case. Donald Hardwick, who won the state lottery two years ago, was found stabbed-to-death in his bed Christmas morning.