MANSFIELD - A Mansfield Choice Academies teacher fired in October was sexually involved with an underage student, according to a Richland County Common Pleas Court indictment released Monday. Noelle Devlin, 31, was arrested Monday on a warrant related to an indictment charging her with 15 counts of sexual battery, third-degree felonies, and 14 counts of child endangering, first-degree misdemeanors, court documents show. Her arraignment is scheduled for 1 p.m. Tuesday before Common Pleas Court Magistrate Gary Dalbey. The indictment did not include the name or age of the alleged victim, but a Galion mother told the News Journal the charges involve her 17-year-old son who wants to marry Devlin. The News Journal will not identify her to protect the victim's identify. The sexual conduct occurred between June 1 and Oct. 5 of this year, according to the indictment. The victim was "enrolled in or attends" Devlin's school, but the indictment did not specify whether she taught the student directly. The mother said her son, then 16, was a student at Mansfield Elective Academy, which is run under Mansfield Choice Academies. The school's Executive Director Debora Franklin previously said Devlin had been a third-grade teacher for the Interactive Media and Construction school since September 2014. The schools are housed in the Ocie Hill Neighborhood Center. Franklin could not be reached for comment Monday. Devlin was not her son's direct teacher, but this summer told her she was getting students together to help clean out her father's house in Mount Vernon after he died, the mother said. Students who did community service would get credit in class, the mother said. She agreed to the arrangement and dropped her son off at the home. Soon after, the mother started to hear rumors the two were dating, but she didn't believe them, she said. Considering they were first coming from her son's ex-girlfriend, she "blew off" the allegations as jealousy. She even let her son attend a wedding with Devlin, "to keep (Devlin's teen) daughter company," the mother said. Then, in September when her oldest son confronted the school about the allegations, the mother said she went in and defended Devlin. "I had no reason not to trust this woman," the mother said of Devlin. "The whole thing has been one lie after another." After a little investigation, she said, she discovered the truth. The mother said a "fake" Facebook account has been traced back to Devlin, and it stated she was engaged to the teen. Her son initially denied having a relationship with Devlin, she said. He told her he was dating an 18-year-old Galion resident by the name of Noey Elizabeth, which was a made-up name. The mother took her suspicions to the school and Devlin was later terminated. Her son never received any credit for the community service he was supposed to be performing, she said. "You are relieved of duty immediately, without pay, due to matters discussed and disclosed during the investigation by the Mansfield Police Department," Devlin's termination letter said. "After it came out, he admitted to it," the mother said. "He said they were in love and they were going to get married.