HUDSON, Wis. (AP) – A 25-year-old man has pleaded guilty to starting a fire at a western Wisconsin elementary school that displaced students and caused an estimated $4 million in damage.  Justin Nelson of Roberts pleaded guilty to arson of a building last Friday in St. Croix County. Court records say charges of criminal damage to property, burglary and possession of THC were dismissed.  Nelson was accused of starting a fire at St. Croix Central Elementary School in Roberts during a break-in April 30. The fire forced more than 600 students in kindergarten through fourth grade to finish the school year at a nearby Girls Scout camp.  The St. Paul Pioneer Press (http://bit.ly/17Cqrhn ) reports repairs were made over the summer, and students were back in the building for first day of school Tuesday.  

    —     Information from: St. Paul Pioneer Press, http://www.twincities.com