BREA ( — An Orange County high school math teacher was arraigned Wednesday morning on charges that she sexually assaulted a 17-year-old student.

Michelle Lynn Johnson, 45, faced six felony counts of oral copulation of a minor and three felony counts of unlawful sexual intercourse, the Orange County District Attorney’s Office said.

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The Anaheim resident was working at Brea Olinda High School when the crimes occurred and has since been placed on administrative leave, officials said.

“Between April and June 2013, the defendant is accused of engaging in an unlawful sexual relationship with the victim including oral copulation and sexual intercourse,” officials said. “The sexual assault occurred on multiple occasions outside of the school and at the school.”

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The victim’s parents contacted police after becoming suspicious of the relationship between Johnson and their son.

If convicted, the former teacher faces a maximum of more than eight years in prison. She is currently free on $20,000 bail.

The investigation into Johnson’s alleged activities was on going as she was also accused of privately tutoring several students during non-school hours and off school property, officials said.

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Anyone with additional information or who believes they have been a victim should contact Supervising District Attorney Investigator Paul Carvo at (714) 347-8794 or Brea Police Department Detective Debbie Stark at (714) 990-7638.