CEDAR RAPIDS — A judge approved amended charges for a former College Community School District bus driver who is accused of kidnapping a 10-year-old girl and attempting to sexually abuse her on a bus.Thomas Alan Williams, 57, now is charged with second-degree kidnapping and enticing a minor, both felonies, as well as two initial misdemeanor charges — sexual exploitation by a school employee and false imprisonment, according to trial information filed earlier this month.If convicted, he now faces up 38 years in prison. The girl, who attends Prairie Hill Elementary School, told authorities that Williams told her to stay on his bus until he dropped off all the other students on his route to the Prairie school campus Jan.