Teenage Sociopath Dismembers Girl, Reveals Details Online

Korea has been shocked by the case of a teenage murderer who revealed the grisly details of his crime on social media. On the day of the murder, the suspect sent images of his crime and the victim’s body to his friends via Kakaotalk and even announced on his profile page that he “felt no guilt or remorse”. An increasing number of stories about young criminals has raised public concern about the phenomenon of the “savage teenager”. After professional criminal psychologists announced that the suspect is likely a “sociopath” (소시오패스), distinct from a “psychopath” (사이코패스), the word “sociopath” became one of the most popular search terms on all portal sites.

Article from TV Chosun:

Teenage Murderer in Young-In Gave Several Hints before Gruesome Murder

by Park Sang-hyun

(Anchor) Did Oh Won-chun appear again? Society is reeling in shock at the details in the case of a teenage murderer. TV Chosun has an exclusive interview with the suspect’s friend, “Choi”, who was with him just before the horrible crime. The suspect “Sim” seemed sociopathic rather than psychopathic.

(Reporter) According to “Choi”, a friend of the suspect, on July 8th he spoke with “Sim” and the female victim before leaving the hotel where they were staying. It was then that he received a horrifying message from Sim with images of dismembered body parts.

Sim said, “I am doing something.. I did something about her. I need more tools. I will finish by 12 a.m. tomorrow.” But Choi didn’t get the exact meaning of what Sim said.

Choi has since confessed that Sim alluded to his intentions to commit murder quite a long time ago, and he also said something about murder on the day of the crime.

Last year, Sim also said, “I am curious what will happen if I kill somebody.” To Choi, Sim sounded like he was making a joke when he asked him “What would you think if I kill one?” Choi didn’t see any clear motivation for murder in Sim.

Sim called not only Choi but also another friend, “Lee”, to confess his crime.

According to his Lee, Sim said in a quiet tone that he had killed her.

Some professional analysts diagnosed his behavior as typical of a “sociopath”, someone who has no sensitivity to violence or cruelty. Others said that his lack of hesitation in informing his friends about his crimes reflected the fact that he had lost all contact with them after he dropped out of school.

Lee Soo-jeong, a criminal psychology professor, said that “his behavior was just part of his daily routine. Because he is part of the social media generation, they usually share their all their emotion on social websites.”

The police issued a warrant for Sim’s arrest on suspicion of murder and announced that his friend “Choi” was no longer the target of the investigation.

timeline of the murder

The Timeline of the Murder
1. July 8th, 5:28 a.m. – Sim, 19, and his friend Choi, 19, went to a hotel.
2. 3:30 p.m.- Sim asked a girl he knew, aged 17, to come to the hotel.
3. 4:00 p.m.- Sim buys two knives, one of them a letter opener and the other a thick chopping blade.
4. 7:38 p.m.- Sim’s friend Choi leaves the hotel.
5. 9:00 p.m.- Sim sexually assaults the girl and then strangles her to death
6. For a period of 16 hours after killing the girl, Sim dismembers the body with the chopping knife, breaking the knife in the process. He leaves the room to buy one more knife at 1:37 a.m.
7. July 9th, 1:34 p.m.- At the nearest market, Sim buys a big plastic bag, originally intended for making kimchi.
8. 2:07 p.m.- Sim returns to his home by taxi after putting the corpse into the plastic bag.
9. 8:10 p.m.- The girl’s parents, who lived in Singapore, checked and found out that their daughter was not at home and then reported her to the police
10. July 10th, 12:30 a.m.- As the police search closes in, Sim turns himself in to the police and is placed under arrest.

Comments from TV chosun :


Is there any reason to keep him alive?


The emphasis on studying without any concern for improving personality leads to this disastrous outcome..


An eye for an eye

Comments from Nate :

Is he even human? He is a son of bitch. Judge, please appease a vengeful spirit. He must be sentenced to death.


He is not human.. I sincerely hope that high officials will give him the death penalty. If not, he will do the same horrible thing at the end of his prison sentence.


Any human rights commission should be destroyed if they say just a word about “human rights”


Just the death penalty? I think it is still insufficient. If there were an afterlife, he should be hacked to pieces there as well.


Do you remember the reason that the merciful judge reduced the sentence for Oh Won-chun, who dismembered his victim into 500 pieces? The reason was that he didn’t use them for human flesh trafficking. Following the precedent, Sim will also not be sentenced to death. At this point, the judge should be blamed and insulted. Fucking psychopathic judge!!


I couldn’t even watch the very first scene of the movie “Hostel”. However, it looks like decided to imitate the movie. I think he is the devil. He is not a human being. He should be sentenced to death.


If I were the father of that girl, I would kill him brutally, even more horribly than he killed my daughter.


Yesterday, in the morning news, I heard that an elementary student was running porn sites. And after I left the office, I heard that a teenager psychopath raped a girl and dismembered her body with a knife and then disposed of the body in the toilet. It’s time to get rid of the Juvenile and Minors Protection Act. Instead of special protections for children, I feel like adults need to be protected from savage teenagers.

ravi**** :

Stop playing with words, I don’t care whether he is a psychopath or a sociopath. Please kill him painfully yet slowly with the same knife he used. Chop his every joint while he is still alive.


Abolishing the death penalty and establishing the Human Rights Commission, courtesy of Kim Dae-jung, former president of Korea. These two things made our country into a paradise for brutal criminals.


I think I must be a psychopath because I would be able to kill him with a smile. Seriously..


If he had killed the daughter of the president, then would you give him the death penalty? It makes me afraid..

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  • Your Sexy Cousin Rex


  • Brett

    Seriously, Korea needs to start using their death penalty for these kinds of creeps.

    Answer to the first commenter from TV Josun: no, there’s no good reason he should be breathing.

    • death_by_ivory

      I agree.I mean he is young,who the heck wants to feed him to the rest of his life?

    • Keith Stone

      True that, let’s save South Korea’s law-abiding taxpayers the trouble of keeping this monster alive!

      • halcyon0000

        but isn’t death penalty more expensive in the long run??

  • lonetrey / Dan

    First things first, the small detail that stood out to me in the comments. “ykim****: Yesterday, in the morning news, I heard that an elementary student was running porn sites.”. Really? When did kids get so smart? I don’t think I really knew how to use the Internet at that age… -_-


    Then the main story. Life imprisonment, or long and slow reformation. To be honest, I don’t know which one would be worse, but both I feel should be chosen over a quick and swift death penalty.

    • Brett

      Teach him to empathize? He doesn’t have feelings, he said it himself.

      Instead of people worrying when the authorities will let him out (they will, no way this kid gets a life sentence without possibility of release) they should just put him down. It’s a win-win.

      Family and communities get payback and closure, while the government uses a penalty that is more likely to make someone think twice before DISMEMBERING ANOTHER HUMAN FUCKING BEING! Holy shit, is death too serious a punishment for even this crime? He chopped up a young girl and sent pictures to his friends.

      My favorite comment is “I think I must be a psychopath because I would beaable to kill him with a smile”.

      • Paul M

        If you would gladly kill another human being, no matter how repugnant and messed up they are, would that make you any different from them? Are you sure that your motivation for calling for the death penalty is not revenge? The death penalty is clearly not a deterrent to people committing crimes, just look at the US and China. After you put this guy to death it won’t be long before another tragedy like this happens.

        • Brett

          Not a deterrent completely, but justice? Sure. Necessary? Well, we could send him to prison where he won’t be rehabilitated and would be released within 15-20 years and be free to kill again.

          Paul, I’m all for rehabilitation and prevention but when push comes to shove, people need to know that their protectors (Gov’t) is protecting them.

          “… motivation…. revenge?
          Yea, probably. But I also have little faith in the established rehabilitation system and that brings me to call for his head. If he doesn’t get rehabilitated, he’s as dangerous as he was last week while he was cutting a human being into pieces (and enjoying it).

          • Ralph

            I’m not from the US, I live in the UK, where the death penalty was outlawed in 1964. I find the idea of state sanctioned murder repugnant. In this horrific case, I would like to see him get a whole life term. No prospect of ever getting out. This happens in the UK for particularly horrific crimes. But presumably doesn’t in Korea. It’s terrible to think what that poor girl endured, she was only starting out in life. It’s heartbreaking.

          • Marcus Muller

            I too am from the UK, however I find giving known/convicted murderers a cozy life in prison for the rest of their life on the dime of tax payers even more repugnant. You can argue that its better they stay alive to reflect upon their crimes, but it’s such a high cost. I say slay them and donate their organs/parts to people who need it. Of course this should be only done if there’s beyond a reasonable doubt that the person is indeed guilty.

          • holdingrabbits

            It’s statistically proven not to be a deterrent at all because most people who commit murders think they’re going to get away with it (and many of them do, like 38% in the US). The problem with sociopaths and psychopaths is that there’s really very little chance of rehabilitation. If we acknowledge it as a disease, then what do we do? Identify them when they’re young and put them down? I understand why people want the death penalty, but I can’t believe that sinking to the level of the criminal is the way to get justice. Knowing that there’s no known cure for psychopathy or sociopathy, I think isolation is the solution. I don’t mean a padded room or something, just let them live on an abandoned island…….Dokdo?

          • Paul M

            Thank you for an honest and open reply (something which is often in short supply on this website). I think in this case the boy has some serious mental health issues and putting him to death would actually be an injustice. His removal from society is absolutely necessary, my guess is that a high security psychiatric hospital would be the best place for him to receive treatment and to serve his sentence as punishment.

            There is a thin line between having our governments protect us and having them oppress us and as in recent times with the homeland security act etc. I think they have overstepped that line. I would feel no more secure or protected if there were a death penalty than if there weren’t.

          • Ruaraidh

            The death penalty gets brought up on this site a lot. That, suicide and war crimes…

        • Guest

          I’m sorry but honestly if i have to kill someone i will so kill this guy. If it makes me different than him? Maybe not,but he deserves it. FUCK he tried to rape this girl and because she defended herself he killed her that way

          His thoughts on this:

          After the murder: “I’m dried out of any emotions that can be felt by human beings. I didn’t feel any guilt today at all, not even sadness or anger. Nothing but a short smile. Today, I’ll fall asleep buried under the smell of blood.”

          3 minutes later: “I wanted to be a **** today. So I was a **** today.”

          “I didn’t have any feelings of hate or positivity. Hate me. I want to go to hell. I have a person I want to bring to hell with me.”

          “I’d like to praise your bravery for staring into my eyes until your very last moment. Thank you for letting me know through your gaze that you weren’t scared at all.”

          Later that afternoon, on the bus to meet a friend: “Cherry blossoms are a scent that you miss no matter how much you smell it. It smells nice from here on the bus. I feel at rest.”

          Four hours before he turned himself in (6:28): “My heart feels at rest today. I may get hate, people may be disappointed in me, but yeah, I’m a bad guy. Let’s just take this easy.”

          (”I’d like to praise your bravery for staring into my eyes until your very last moment”)

          ^ So yes,I would kill
          someone..repugnant and messed up like him.And if anything i don’t want them to give him death penalty i just want him to rot in a jail for the rest of his life.

      • lonetrey / Dan

        He doesn’t have feelings _now_, but maybe he may develop those emotions later in life.

        Also, we can’t just take his word for it. Perhaps he’s just building an image of himself for others to see. “Oh I’m so hardcore because I can kill and not care, that’s just how strong I am emotionally, or this makes me so unique”. That sort of thing.

        Point is, we don’t know enough, but long and slow reformation might expose what’s really going on in his mind. And if we do end up finding out that he’s a hollow empty shell… perhaps other options need to be considered. But that’s later and not now.

        • commander

          Given thr immense cruelity in the murder, the teenage killer will find himself accepted into society, meaning that he already turn into a monster, and that he might choose to take his life if he somehow feels regrets or remorse over what he did.

          The societal focus should be on preventing minors alienated from homes and schools from becoming monsters. That is the lesson I have to learn from this frightening murder case.

          • Brett

            I agree, but it would take a lot of taxpayer money and reformation in the educational systems to do it. I just can’t see it happen. If S. Korea managed to pull it off, some might say the country would be as close to an utopia as one could get.

      • Harvz

        I agree with this. Ethics debates aside, some people just need to be removed from society.

  • commander

    Stronger penalty for punishment might be unlikely because he is a minor and he might be diagnosed as mentally problematic.

    The ghastly teenage crime may reveal that teens, still shaping their self perception with exchanges with peers and under parental discipline and public education, could veer off the ordianry course of action and commit a crime of inconceivably inhumane proportions.

    This possibility raise need to bring into fold teens who have unfortunate family background and are wandering excluded from the public safety net.

    Penalty is insufficient in deterring more crimes as its effectiveness is often question in that it has no impact on potential criminals with no hopes on their life and no rational judgement.

    Thus the governmental efforts to preclude horrendous crimes occuring focus on a broader welfare to provide tightly-weaved safety net to the needy in blind spots, especially adolescents, in a bid to elininate potential teenage crimes from sources–a kind of proactive approach in handling teen crimes.

    The shocking body-dismembering murder should arouse public awareness of necessity of preventing teens from committing preventable crimes.

    • lonetrey / Dan

      Valid points, but what do you think about this specific case that has already happened? What do you think should be done about the kid who has already committed a crime?

      • commander

        First, the cruel teenage murder is an indication of how porous public safety net in Korean society is, and points to future policy direction.

        Second, punishment should be feted out for the teenage murderer in proportion of the crime though his age might become mitigating circumstances.

        Third, under no circumstances should murdering be justified except when capital punishment is handed down in a ruling.

        Fourth, premediated murder should be penalized according to law but negligent homicide, killing by the psychologically problematic might be blamed partly on the lack of preventive measures.

        In conclusion, the teenage murderer should be subject to legal punishement but in that a possible victim migjt be you or your familiy memeber, the responsibility of taking preventive measures like what I said above falls on us.

        • lonetrey / Dan

          Hmm, you seem to be really focused on future incidents. Just an observation.

          But I see what you’re saying.

          • commander

            The incident already took place. We should punish the crazy criminal.

            The thing the suspect did is crazy and this agreed on by everyone.

            What can I say else, except saying thos kind of chilling crime should be prevented. Dont you think?

          • lonetrey / Dan

            True, but I think the biggest problem at hand is that no one seems to agree on what to do with the kid. Or that people are just stubbornly hanging on to the death penalty punishment without considering alternative solutions.

            Without debate and discussion, no compromise in opinion would form.

          • commander

            The rational debate over horrible crimes is often impossible. The method by a brutal crime is committed enrages the public who then become vociferous supporters of a maximun penalty–capital punishment.

            As a result, people are critical of those who have what they see as moderate stance on the level of punishment for criminals.

            Those critics often ask moderates if they have composure when they have beloved ones one of victims in what a beast not a person commited with a cold blood mindset.

            Humans are rational but emotions take precedence over rationality, I think.

  • Ryan Kim

    This is why a North Korean government isn’t so bad, it keeps these psycho Koreans in balance. No wonder the Japanese killed them.

    • lonetrey / Dan

      A little extreme, don’t you think?

    • mr anderson

      byung shin sekki

    • Ruaraidh

      North Korea is one big Gaol, and it’s the sociopaths who are running it!

    • min

      어휴 트위터 보니까 한국인이네 나가 뒈져라.
      한심한 오타쿠 히키코모리 좃밥 호로 쓰레기새끼야.

    • Von

      whoa whoa whoa… what has this got to do with the Japanese or the North Koreans? Are you trying to say that Koreans are all sociopaths?

    • Sillian

      That is one retarded comment.

    • mimo

      Do you leave the house at all?

    • KCdude

      Let’s say this in a non controversial way. Koreans are full of struggles within themselves and these struggles are generating some huge problems.

    • Keith Stone

      Mr. Kim, what you’ve just said is one of the most insanely idiotic things I have ever heard. At no point in your rambling, incoherent response were you even close to anything that could be considered a rational thought. Everyone in this comment thread is now dumber for having read it. I award you no vote-up points, and may God have mercy on your soul.

      (extra points if you remember the movie where this was said)

      • Goose

        Wasn’t that Billy Madison? Adam Sandler’s response.

        • Keith Stone


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  • pingu777

    What I want to know is if this is a trend, if killings like this are on the rise and how they can be stopped. Sure punishment would bring closure but prevention would save lives.

    • Yondae

      I agree. While the death penalty may be appropriate, larger systemic issues should be addressed. From the very small sample of netizens above, it appears that most are focused on ‘after-the-fact’ punishment rather than prevention.

  • jon776

    The only way to prevent things like this is to create a better welfare system.

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  • chucky3176

    South Korea hasn’t carried out a death penalty since 1997. With very strong opposition from human rights groups. There have been a few people sentenced to death since, but they’re all just waiting on death row, effectively serving out a life sentence. I don’t see this changing any time soon, and it’s certain that they will not give out a death sentence to a teenager. The courts will never give a death sentence to a teen because they know it will cause a national uproar.

  • KCdude

    I ask myself this. Why are these incident happening all of sudden? (cries in the corner of my room)

  • it is surprising that sociopath would turn himself in, unless it is for fame to feed their narcissistic needs. Sociopath are caused by their environment, could be that he was abandon as a child, lived in a family with constant domestic violent or family related problem. Anyway from the article written here it sound more like a psychopath rather than a sociopath.

    Here are some distinction


  • Mighty曹

    Korea should stop making film noirs. It read so much like a movie.

  • bultak23

    oh that people could recognize the signs of such evil intent and prevent it.

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