Ji-young Allegedly Murdered by Yong-soo, Daejeon, South Korea
This source-based behavioral analysis does not establish a clinical diagnosis, motive, or legal finding.
The case involves a relationship marked by escalating coercive control, possessiveness, and stalking by Yong-soo over Ji-young, culminating in fatal violence. Ji-young's misinterpretation of controlling behavior as love delayed her escape, while Yong-soo's psychological profile reveals entitlement and immaturity contributing to his actions.
Yong-soo's behavior evolved from affectionate courtship to isolating and controlling Ji-young by limiting her social contacts and monitoring her movements. His jealousy and anger intensified when Ji-young resisted his demands, especially regarding her planned overnight trip with friends. The relationship was characterized by gaslighting, coercive control, and escalating violence.
The pathway began with stalking and social isolation, followed by repeated violent incidents including property damage and physical assault. The final escalation involved strangulation and pushing Ji-young off an overpass during a heated argument, resulting in her death.
Each entry separates the reported behavior or state from the analytical strength of the available narration.
| Behavior / construct | Person / subject | Detailed case context | Evidence |
|---|---|---|---|
| Coercive control Control dynamics | Yong-soo SuspectLover of victim |
Yong-soo changed Ji-young's phone to a couple's phone with only five contacts allowed, effectively cutting off her social interactions. He tracked her location and followed her secretly, demonstrating controlling and possessive behavior. Context or trigger: After dating began and Yong-soo became unemployed Reported expression: Isolated Ji-young by controlling her phone contacts and monitoring her movements |
Explicitly reported Confidence: High |
| Jealousy Emotional state | Yong-soo SuspectLover of victim |
Yong-soo opposed Ji-young's plan to go skiing and stay overnight with friends, leading to intense fights. His jealousy was a key factor in escalating conflict. Context or trigger: Ji-young's planned overnight trip with female friends Reported expression: Anger and violent outbursts during arguments |
Explicitly reported Confidence: High |
| Dependency or attachment insecurity Attachment-related behavior | Yong-soo SuspectLover of victim |
Yong-soo repeatedly pressured his parents to approve marriage despite young age and lack of economic stability, reflecting insecurity and need for control. Context or trigger: Desire to marry young and control Ji-young Reported expression: Persistent pressure on parents for marriage approval |
Narrative-supported psychological state Confidence: Moderate |
| Anger or resentment Emotional state | Yong-soo SuspectLover of victim |
When Ji-young insisted on going on the trip despite Yong-soo's opposition, his anger exploded, culminating in the fatal assault. Context or trigger: Ji-young's defiance regarding overnight trip Reported expression: Explosive anger leading to fatal violence |
Explicitly reported Confidence: High |
| Victim devaluation Cognitive pattern | Yong-soo SuspectLover of victim |
Yong-soo considered Ji-young his property and threatened to prevent her happiness with others if she left him. Context or trigger: After gaslighting success Reported expression: Viewing Ji-young as possession and expressing threats |
Narrative-supported psychological state Confidence: High |
| Maladaptive coping Coping response | Ji-young VictimLover of offender |
Ji-young sent texts saying 'I love you' and downplayed incidents like broken car windows to avoid worsening conflict, reflecting maladaptive coping. Context or trigger: Facing escalating violence Reported expression: Attempting to calm Yong-soo and cover incidents |
Explicitly reported Confidence: High |
| Separation or abandonment threat Loss or threat | Ji-young VictimLover of offender |
Ji-young feared that expressing desire to break up could provoke violent reactions from Yong-soo, leading her to delay separation. Context or trigger: Considering ending relationship Reported expression: Fear of violent retaliation if breakup attempted |
Explicitly reported Confidence: High |
| Social isolation Relationship stressor | Ji-young VictimLover of offender |
Yong-soo limited Ji-young's phone contacts to five numbers and attempted to cut off her close friends, isolating her socially. Context or trigger: Yong-soo's control over her contacts Reported expression: Reduced access to friends and support network |
Explicitly reported Confidence: High |
| Emotional abuse Control dynamics | Yong-soo SuspectLover of victim |
Yong-soo exhibited repeated degrading and manipulative conduct, including jealousy and threats to prevent Ji-young's independence. Context or trigger: Throughout relationship Reported expression: Jealousy, threats, and controlling behavior |
Explicitly reported Confidence: High |
Select a stage to expand it; scroll horizontally to follow the full sequence.
Relationship began with affection and gift-giving, making Ji-young feel loved and secure.
Yong-soo isolated Ji-young by limiting her phone contacts and cutting off friends.
Yong-soo's jealousy intensified over Ji-young's plans to stay overnight with friends, leading to fights.
Yong-soo broke car windows and physically assaulted Ji-young during arguments.
During a heated fight, Yong-soo strangled Ji-young and pushed her off an overpass, causing fatal injuries.
Yong-soo denied involvement despite evidence; legal process involved changing charges and sentencing.
Psychological evaluation revealed self-centeredness, entitlement, and immaturity contributing to controlling behavior.
Arrows show the sequence described in the source narrative; they do not prove that one psychological state caused the next event.
Analysis is limited by reliance on reported facts without clinical diagnoses. Psychological insights are based on narrative and investigative reports, lacking direct clinical evaluation of subjects.