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A man in his 20s was caught while chasing his ex-girlfriend while swinging his weapon. A man who has been punished for dating violence against another woman six years ago.

Ahn Hee-jae reports.

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At about 10:50 last night, I received an emergency report with 112 saying that my friend was in danger.

"I have a boyfriend again," "I told the police," he said received a friend's message.

Police officers were dispatched, but Seo Mo, who was 27 years old, had already breathed his stomach twice.

An ex-boyfriend, 29-year-old An Mo, fell to the scene with a weapon.

Police confirmed on-site CCTV that Ahn was hiding in the apartment parking lot, so when he returned, he talked for a moment and confirmed that he had a weapon.

The incident scene. The two were found collapsed in front of the elevator here.

[Apartment official: (residents) There's a lot of blood, the police come, what's going on? I thought it smelled of lax at first ... .]

Ahn is known to have asked her to meet again after he broke up with Seo, who had been dating for over a year.

Police confirmed that Ahn was sentenced to death after six years ago after breaking up with another woman.

The police will investigate the motive for the crime as soon as Ahn in the intensive care unit finishes treatment, and then apply for a warrant for murder.

More than 50 people have died from dating violence in the past three years, or more than 160, including attempted crimes.

The Dating Violence Prevention Act, which strengthens punishment for stalking crimes, has been in Parliament for nearly three years because of disagreements between related ministries.

(Video coverage: Park Dong-ryul, Video editing: Won Hee)