Dawn Diimmler, 44, a married, former assistant principal in Columbia, South Carolina has pleaded guilty to harassment after being charged with sexual battery

A disgraced assistant principal and mother-of-three in South Carolina has pleaded guilty to a harassment charge in Richland County after being accused of having sex with a 19-year-old male student.

Former Airport High School Assistant Principal Dawn Diimmler, 44, who was accused of having sexual intercourse multiple times with a 19-year-old student over the course of three months in 2017, pleaded guilty on December 21 to second-degree harassment.

Diimmler originally faced the charge of sexual battery with a student 18 years of age or older in Richland County.

With her guilty plea, should be sentenced to up to 30 days in jail or a $200 fine.

She also faces sexual charges in Lexington County, where the school is located in the city of Cayce, which are still pending.

The Cayce Department of Public Safety issued the following statement on February 24:

'In a collaborative effort and investigation between the Cayce Department of Public Safety and the Columbia Police Department, Dawn P. Diimmler will face charges of sexual battery in both jurisdictions.

'Between the dates of March 10, 2017 and June 2, 2017, Dawn P. Diimmler was engaged in an alleged relationship with a 19-year-old student enrolled at Airport High School while she was assigned as the school's Assistant Principal.

'Dawn Diimmler further had direct supervision over the student as part of her duties and engaged in sexual intercourse with the student on two (2) occasions while at the school which is located at 1315 Boston Avenue in the City of Cayce.'

Diimmler was also accused of having sex with the student at least on other time, in a hotel room she rented on April 28, 2017 in the Harbison area, according to an incident report recorded by Columbia Police.

Diimmler turned herself in to face charges of sexual battery related to having intercourse with the student in February.

Even though the student allegedly involved in a sexual relationship with Diimmler was 19 at the time of the accused activity, she still faced felony charges based on her position of power over the student, under South Carolina law. Diimmler is seen here with her husband and children

On February 26, Lexington School District Two released three letters from school district officials to Diimler, dated earlier this year, that claimed the authority figure was heard on a recording telling the student's mother that she was in love with her son.

Diimmler was then charged with felonies of sexual battery in the cities of both Columbia in Richland County and Cayce in Lexington County, City of Cayce spokesperson Ashley Hunter confirmed to DailyMail.com in February.

Diimmler was fired from Airport High School back in February. The high school released a statement on February 13 regarding its termination of Diimmler.

'Ms. Diimmler was terminated following the district’s investigation into allegations that she might be involved in an unprofessional relationship with a student,' school spokeswoman Dawn Kujawa said in the statement.

'During that investigation, the district became aware of facts indicating the possibility of criminal activity. In response, the district notified law enforcement that same day, January 30, 2018, of those facts and has continued to cooperate with law enforcement during its investigation.'

Even though the student allegedly involved in a sexual relationship with Diimmler was 19 at the time of the accused activity, she still faces felony charges based on her position of power over the student, under South Carolina law.

Her official charges were for 'sexual battery with a student 18 years of age or older, where there is direct supervisory authority, no aggravated force or coercion.'

Diimmler is a mother of three. She is seen here with her husband and their children

Diimmler had worked at Airport High School since 2012. She is currently married with three children.

The school's principal, Brad Coleman, resigned in June, according to the State.

David Damm is now listed on the online staff director as principal of Airport High School.

If convicted of the outstanding felony in Cayce, Diimmler could face a potential penalty of up to five years in prison in addition to the sentence imposed in Richland County.