MONROE - A Green County judge granted a six-month extension Thursday in the appeal of a Brodhead man's conviction of shaking his infant son to death. Casey J. Shelton, 39, was found guilty of first-degree reckless homicide at a jury trial in January 2009 and sentenced to 40 years in prison for the 2007 death of his 2-month-old son, Christopher. He's incarcerated in Waupun.