In 1957, Illinois witnessed a tragedy that would haunt the authorities for decades, and become their coldest case to go on trial. On December 3,Maria Ridulph, 7, went out to play with Kathy Chapman, 8, in Sycamore on a snowy night, and her family never saw her alive again, CBS News reported. Her kidnapping and eventual murder not only impacted her family but forever altered the way of life in Sycamore. At around 6 p.m. Maria Ridulph ventured out to play with her friend, CBS News reported. Sycamore was a small town where no one closed their doors. “Today, I’m sure a lot of parents … are sayin…