A Downers Grove South High School teacher has been charged with sexually abusing a student. Christina Formella, 30, of the 1300 block of Hughes Avenue in Downers Grove, is charged with aggravated criminal sexual abuse and criminal sexual assault. According to a prosecutor’s petition to detain Formella, she had sexual contact with a 15-year-old boy in December 2023. She was 28 at the time. She had been a coach for his soccer team the year before and was also tutoring him, according to the petition. The alleged abuse was discovered Friday, when the boy’s mother bought him a new phone and signed in to his iCloud account, authorities said. She found messages between the boy and Formella about sexual activity and a relationship, according to the petition. When questioned by police, Formella denied the sexual contact, according to the petition. Prosecutors said investigators found more evidence corroborating the relationship, which the boy ended, police said. For more, go to Dailyherald.com.