LINCOLN -- The Nebraska State College board of trustees is asking a judge to dismiss a lawsuit filed by the mother of a Peru State College student who disappeared nearly three years ago. Attorneys filed the motion in the lawsuit filed by LaTanya Thomas. She alleges that the college and other officials failed to protect her daughter, Tyler Thomas, from fellow student Joshua Keadle. He's in prison for sexual assault in a separate case. LaTanya Thomas alleges that Keadle murdered her daughter in December 2010. The girl's body has never been found. Authorities believe Keadle was the last person to see Tyler Thomas alive. A judge previously signed an order dismissing Peru State College, the state of Nebraska, and local officials as defendants in the lawsuit.