A former teacher in Polk and Orange counties who is already accused of having a sexual relationship with a student is now facing new charges with a new victim.

The Polk County Sheriff's Office said a new victim was identified after Jennifer Fichter's arrest last week. Fichter is now facing 20 additional counts of unlawful sexual activity with a minor.

Fichter remains in the Polk County Jail and will face a judge Thursday on the new charges.

Fichter, 29, was teaching at Lakeland's Central Florida Aerospace Academy when she allegedly had sex with a 17-year-old student.

A second student told Polk County investigators that he had a sexual relationship with Fichter during the 2011 to 2012 school year, when she was 26 and the student was 17.

Fichter used to teach at Robinswood Middle School in Orlando. She resigned once an investigation began into allegations of inappropriate text messages with students.