[3] Oh Keo-don sexually harassed a female aide during a meeting on April 7, 2020.

Immediately after Oh Keo-don announced his intention to resign, the victim expressed regret through the Korea Sexual Violence Counseling Center and did not report it to the police, even though he said the situation at the time was clearly a punishable crime.

In the statement, the victim said, "I was summoned by Oh's secretary for the first time during work hours early this month, and I hurriedly went to the office to be sexually harassed by the words of business calls," adding, "I realized that I could be recognized as a forced molestation, regardless of the seriousness, I am afraid that I would be seen as an unusual person," adding, "There was no political pressure and no conciliation."

The next day, the leaders of the Democratic Party of Korea held an ethics committee meeting to decide to expel Oh Keo-don, but failed to open due to a lack of quorum, and unanimously decided to expel him on April 27, 2020.

The court rejected his claims that his crimes could be excused due to his alleged dementia and cognitive problems.