A Vail school teacher was arrested Monday on charges of having a sexual relationship with one of her students, Tucson police said.

Christie Elliot, 25, who coached the cheer squad and taught English at Empire High School, 10701 E. Mary Ann Cleveland Way, for about a year, turned herself in to Tucson police as a result of a three-week investigation into her relationship with a 15-year-old boy.

She was charged with one count each of luring a minor for sexual exploitation and sexual conduct with a minor and booked into the Pima County jail, according to Officer Chuck Rydzak, a police spokesman.

Police began investigating April 19 at the behest of the Vail School District after a parent told the Empire High principal that Elliot had been exchanging inappropriate text messages with his son via his iPod Touch. Some of the messages referred to kissing and the "need to be more careful," according to court documents filed by police.

During the district's initial investigation, laptop computers issued by the school to staffers and students were confiscated from Elliot and the student, court documents state. Elliot's computer was found to contain topless pictures of the teacher. It is undetermined whether she sent those photos to students, according to court documents.

Calvin Baker, district superintendent, said Elliot no longer works at Empire. "We have sufficient information to provide assurance that she will not be back in a Vail classroom," he said.

Contact reporter Kimberly Matas at 573-4191 or kmatas@azstarnet.com