ALLENTOWN, Pa. — A Pennsylvania school district that was at the center of a highly publicized "

sexting

" case was sued today by a teenager who claims her principal confiscated her cell phone, found nude images she had taken of herself and turned it over to prosecutors.

Tunkhannock Area High School Principal Gregory Ellsworth illegally searched the 17-year-old's phone in January 2009, even though she intended the racy photos to be "seen only herself and, perhaps, her longtime boyfriend," according to the federal lawsuit.

It says the principal gave the phone to George Skumanick Jr., at the time the Wyoming County district attorney, who threatened to file felony child pornography charges against the girl unless she took a class on sexual violence.

In Perry County, student accounts and audio recordings of disciplinary hearings conducted by the Susquenita School Board show at least three district administrators viewed pornographic images on student cell phones during a sexting investigation last year. State police and Perry County District Attorney Charles Chenot are looking into whether the district's investigation was conducted improperly.

"I was absolutely horrified and humiliated to learn that school officials, men in (the) DA's office, and police had seen naked pictures of me," said the plaintiff in the Tunkhannock case, now 19 and identified in court documents only by the initials N.N. She graduated in 2009.

"Those pictures were extremely private and not meant for anyone else's eyes. What they did is the equivalent of spying on me through my bedroom window," she said in a statement released by the American Civil Liberties Union of Pennsylvania, which is representing her.

The suit, filed in Scranton, seeks unspecified damages against Ellsworth, the district, the county, prosecutors and a detective. It also seeks the destruction of any images still in the possession of law enforcement.

District Superintendent Michael J. Healey, the school district’s lawyer and current District Attorney Jeff Mitchell all declined to comment Thursday, saying they had not seen the suit. Ellsworth and Skumanick did not immediately return phone messages.

The district in rural northeastern Pennsylvania was at the center of the nation's first criminal case involving sexting — the practice of sending explicit photos via text message — to reach a federal appeals court. The court ruled in March that prosecutors could not criminally charge a teenage girl who appeared in a photo similar to the one involved in the latest lawsuit.