Investigators are looking for additional possible victims.
Julie Elizabeth Tichon, 37, a Los Angeles resident who was working at YULA High School, was arrested last month for sexual assaults on one male minor.
Last week the Los Angeles County District Attorney's Office filed three counts of unlawful sexual intercourse with a minor and one count of oral copulation of a person under 18.
She was booked and pleaded not guilty at her arraignment on Sept. 19, then released by the court on her own recognizance. She's due back in court on Nov. 1.
Authorities say Tichon maintained an unlawful sexual relationship with the minor between February and March of 2024.
"She worked at the school since approximately 2020. No criminal record, no complaints before," said LAPD Det. Brent Hopkins. "So we want to see, was this just an isolated incident, or she got in over her head with this young man? Or were there others who she victimized and those students just haven't come forward yet?"
If convicted on all charges, Tichon faces a possible sentence of up to five years in state prison, according to the DA's office.
She no longer works at the school.
"Educators and school staff have a fundamental duty to create a safe environment for all students, and when that trust is broken, it affects the entire community," said District Attorney George Gascón.
Investigators believe there may be more victims. Anyone who has information is asked to contact detectives at (213)473-0561. Calls can also be made to 1-877-LAPD-24-7 or anonymous tips provided through Crime Stoppers at 1-800-222-TIPS.