OMAHA, Neb. (AP) âÄî A former teacher who fled to Mexico with a 13-year-old student so she could have sex with him was sentenced Monday to six years in federal prison. Kelsey Peterson, 26, had pleaded guilty in July to a charge of transporting a minor across state lines to have sex and avoided a similar charge that would have carried a mandatory 10-year minimum sentence. She will be credited for nearly one year she has already served and could get another year off for good behavior, said U.S. Attorney Joe Stecher. The guilty plea doesnâÄôt mean Peterson is off the hook on state charges, which include kidnapping and first-degree sexual assault. Her attorney, James Martin Davis, said he hoped those charges will be dropped, but Dawson County Attorney Elizabeth Waterman said she will proceed with a state case. Peterson and her relatives and friends cried as they waved to each other across the courtroom and said, âÄúI love youâÄù after the hearing. She started having sex with the boy when he was 12 years old and a student at the middle school where she taught in the south-central Nebraska town of Lexington. PetersonâÄôs attorney, James Martin Davis, had publicly questioned the boyâÄôs birth certificate. Davis said the boy was likely at least 16, and that he was the aggressor. Amy Peck, attorney for the boy and his family, bristled at the suggestion. âÄúHe was a 12-year-old boy and the defendant knew it,âÄù Peck said in July, after PetersonâÄôs guilty plea. Peterson was the boyâÄôs sixth-grade math teacher at Lexington Middle School during the 2005-06 school year, then started having sex with him in November 2006, according to court documents. She and the boy disappeared in October, soon after the school districtâÄôs superintendent confronted Peterson about allegations of an inappropriate relationship with the boy. Peterson was arrested a week later in Mexico after the boy called his family. The Associated Press previously named the boy as police were searching for him but stopped using his name after authorities charged Peterson with a sex crime. The boy was an illegal immigrant at the time but has been granted humanitarian parole by the Department of Homeland Security. Peck has said she plans to seek a visa that could put the boy and his parents on the path to citizenship. She said there is no relationship between Peterson and the boy. âÄúI would fully doubt if there will be a relationship in the future,âÄù Peck said.