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Jung Yoo-jung, who was arrested on suspicion of killing a woman in her
20s, was found to be outside the category of a normal person as a result of a psychopathy diagnostic test. The prosecutor's office plans to extend the time limit for detention if necessary to establish a clear motive for the crime.

KNN Min-jae Lee reporter covered it.

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23-year-old Jung Yoo-jung told police that he usually wanted to try murder.

It showed the meticulousness of visiting the victim's house by pretending to be a student and wearing a school uniform and the cruelty of mutilating and abandoning the corpse.

[Jung Yoo-jung/Suspect: (When did you start having homicidal thoughts?) .......]

Experts suspect psychopathic tendencies.

[Lee Jeong-jung, professor of criminal psychology at Gyeonggi University: Psychopaths are over-self-excessive, megalomaniacal thinkers, and I wonder if they say that they dreamed of killing as if they were great beings.]

Police are conducting a psychopathy diagnostic test on the oil refinery and analyzing the results.

As a result of the police psychopathy test, Jung Yoo-jung was found to have abnormal idiosyncrasies that did not fall into the category of normal people.

There is also a point of view that he lived alone with his family for five years, with no apparent job or interaction with the outside world.

It even goes so far as to label it a reclusive loner crime.

However, the reclusive loner is characterized by placing the blame on himself for being afraid to meet people.

This is why it is pointed out that it does not match the crime of the oil refinery.

[Park Joo-hong, Senior Research Fellow, Busan Research Institute: (Reclusive loners) are people who are afraid of what people will say about them, and I think that if this incident makes them look at them in a worse light, it may lead to them hiding even more.]

Meanwhile, the prosecutor's office plans to continue the investigation until the end of the detention period for the oil well on the 5th of this year, and to extend the detention period once more if necessary.

(Video interview: Jeon Jae-hyun KNN)

KNN Min-jae Lee