GREENSBURG — A 15-year-old boy who spent 12 days in a juvenile detention center on charges he phoned in a bomb threat to his school has sued the principal and state trooper he says wrongfully accused him.

Cody Webb's federal lawsuit contends authorities rushed to judgment and wrongly concluded he phoned in the threat in March because the school district had not reset the clock on a phone system to compensate for daylight saving time.

Police charged Webb because they thought his cell phone records showed he called Hempfield Area Senior High School within a few minutes of the threat. But a judge threw out the charges after Cody's attorney determined the school had not moved the timer forward an hour for daylight saving time, meaning the cell phone call and the threat were made more than an hour apart.

Webb contends he merely called the school early that morning to see if there was a recorded message to alert students about a school delay.

Principal Kathy Charlton did not return a message left on her office voice mail Tuesday. The state attorney general's office, which represents state police in litigation, did not return a call for comment.