A 52-year-old woman has been charged with having an inappropriate sexual relationship with a teen over the span of three years, the Los Angeles County District Attorney's Office announced.

Mary Jahn (dob 9/10/65) of Lakewood has been charged with nine felony counts in case NA107331 four counts of sexual penetration by foreign object, three counts of lewd act upon a child and two counts of oral copulation of a person under 18.

The defendant is scheduled to be arraigned this afternoon in Department S01 of the Los Angeles County Superior Court, Long Beach Branch. Prosecutors are asking that bail be set at $750,000.

Deputy District Attorney Troy Davis of the Victim Impact Program, who is assigned to the case, said at the time of the reported crimes Jahn was a teacher at Lakewood High School.

In July 2008, the defendant allegedly began having a sexual relationship with a 15-year-old female student, the prosecutor said. The sexual molestation reportedly continued until July 2011, the prosecutor added.

Earlier this year, the now adult victim alerted authorities about the sexual abuse, according to the prosecutor. After further investigation, law enforcement arrested Jahn on Sept. 13 in connection with the alleged crimes.

If convicted as charged, Jahn faces a maximum possible sentence of eight years and four months in state prison. Additionally, the defendant will have to register as a lifetime sex offender.

The case is being investigated by the Long Beach Police Department.

Los Angeles District Attorney / case NA107331 / September 14, 2017