(AP) — A federal judge has signed an order to drop Peru State College, the state of Nebraska and other local officials from a lawsuit in which a mother blamed them in the disappearance of her daughter.

LaTanya Thomas filed the lawsuit last year accusing the college and officials of neglecting to protect her daughter, 19-year-old student Tyler “Ty” Thomas, from fellow student Joshua Keadle, who is in prison for sexual assault in a separate case.

Tyler Thomas has not been seen since Dec. 2, 2010. Investigators believe Keadle was the last person to see her alive.

LaTanya Thomas agreed to the dismissal of the school and other defendants. The lawsuit now proceeds against Keadle, the Nebraska State Colleges Board of Trustees and ten unknown people listed only as John Does.