Former teacher Kelsey Peterson 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. 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 ten year minimum sentence. The charges also include kidnapping and first degree sexual assault. Peterson started having sex with the boy when he was 12 years old and a student at the middle school where she taught in Lexington, Nebraska.

Look at photos of other female teachers who prey on their class.