The suspect has since told the police that he committed the crime because he “hated women for belittling him.”

Seoul Seocho police said the victim had been drinking at a bar on the first floor of a four-story building located between Gangnam Subway Station (line No. 2) and Sinnonhyeon Subway Station (line No. 9). She was killed in the bathroom halfway up the staircase from the restaurant leading to a karaoke on the second floor.

The victim’s boyfriend discovered her bloodied body collapsed on the bathroom floor. She had been stabbed three to four times on the left side of her chest.

Based on the surveillance video, the police arrested a 34-year-old man surnamed Kim who worked as a part-time waiter at a nearby restaurant.

Kim was recorded entering the bathroom before the victim and nonchalantly leaving.

The police caught Kim as he turned up at the restaurant he works in, wearing the same clothes from the night before and with a 32.5 centimeter-length knife inside his pants pocket. The weapon was from the restaurant kitchen.

Kim admitted his crime and told the police that he did not personally know the victim but that he hated women for ignoring him. He said he took out the knife with malicious intentions.

The police are investigating whether he intended to sexually assault her.

By Lim Jeong-yeo (kaylalim@heraldcorp.com)