← Back to South Korea casesMs. Jung Allegedly Murdered by Mr. Lee, Sejong City, South Korea
Case Summary
On August 17, 2019, Ms. Jung, a researcher at the National Land Research Institute in Sejong City, was found collapsed and later died from a brain hemorrhage. Mr. Lee, the deputy director of the institute and Ms. Jung's superior, was involved in a secret sexual relationship with her. After Ms. Jung collapsed at his apartment, Mr. Lee failed to call for emergency help promptly, allegedly due to fear of exposure and damage to his honor and family. He dragged her unconscious body, attempted to place her in her car, and delayed seeking medical assistance until hours later. The prosecution charged him with intent related to failure to provide aid, resulting in an 8-year sentence. The case highlights complex relationship dynamics, secrecy, and moral responsibility issues.
Basic Information
Country: South Korea
State/Province: None
City/Region: Sejong City
Incident Type: Non-Murder
Relationship Status: Extramarital relationship
Relationship Duration: Approximately 11 months
Incident Date: Aug. 17, 2019
Relationship Journey
Relationship Origins:
- Met at Workplace
- Friends circle
Relationship Stages:
- Dating
- Living Together without Marriage
Analysis
Contributing Factors:
- Cheating / Infidelity
- Domestic Violence Allegation
- Domestic Conflict
Red Flags:
- False accusations of infidelity
- Deception after incident
- Escalation Pattern / Violence
- Missing Suspect
- Threats
- Divorce Pending / Recent Separation
Motives:
- Family pressure
- Fear of exposure
- Eliminate romantic partner
Relationship Outcomes:
- Legal case ongoing
- Homicide before marriage
- Arrest made
- Relationship ended
People Link Graph
Relationship Journey Graph
Origin
- Met at Workplace
- Friends circle
How the relationship or connection began.
Status
- Extramarital relationship
Approximately 11 months
Stages
- Dating
- Living Together without Marriage
Important relationship phases recorded for this case.
Warning Signals
- False accusations of infidelity
- Deception after incident
- Escalation Pattern / Violence
- Missing Suspect
- Threats
- Divorce Pending / Recent Separation
Reported red flags or early concern points.
Pressure Points
- Cheating / Infidelity
- Domestic Violence Allegation
- Domestic Conflict
- Family pressure
- Fear of exposure
- Eliminate romantic partner
Contributing factors and possible motives from the available sources.
Incident
2019-08-17
Outcome
- Legal case ongoing
- Homicide before marriage
- Arrest made
- Relationship ended
Recorded relationship or case outcome.
Sources
English labels are shown first. Original-language titles are preserved for source verification.
Ms. Jung Allegedly Murdered by Mr. Lee, Sejong City, South Korea
사건의뢰 · Original language: Korean
View original title
[치정] 그는 범죄자인가 목격자인가? l 세종시 내연녀 방치 살인 사건
AI Intelligence Assessment
Relationship Pattern
Infidelity
Pattern Analysis
The case involves a secret extramarital affair between a superior and subordinate at a workplace relocated to Sejong City, with weekend-only meetings to avoid detection. The victim's sudden medical emergency was neglected due to the suspect's fear of exposure and family ruin, illustrating how infidelity and fear of social consequences can lead to fatal neglect.
Investigative Notes
Police investigation included CCTV footage analysis, phone and tablet seizure revealing intimate photos and frequent apartment visits, and questioning of Mr. Lee. The prosecution charged Mr. Lee with intent related to failure to provide aid. The first trial acquitted him of causation but the prosecution appealed, reinforcing the causal link with expert opinions. The suspect was sentenced to 8 years imprisonment.
Investigation Confusion
Initial confusion over whether the death was natural or caused by neglect. The suspect's denial of relationship and attempts to fabricate alibis complicated early investigation. The court initially ruled no causal link between failure to rescue and death, leading to prosecution appeal.
Case Reconstruction / Puzzle Pieces
Ms. Jung and Mr. Lee had a secret sexual relationship starting at least September 2018. On August 16, 2019, they dined together and returned to Ms. Jung's apartment. Ms. Jung suddenly vomited and lost consciousness around 11 p.m. Mr. Lee cleaned her and left her unconscious. He dragged her out early morning, attempted to place her in her car, and delayed calling emergency services until 6:40 a.m. Ms. Jung died from a brain hemorrhage between 4 and 5 a.m. The suspect's fear of exposure and family ruin led to failure to provide timely aid.
Risk Assessment
High risk due to secretive extramarital relationship, fear of exposure, and failure to provide aid in a medical emergency. The suspect's behavior showed moral disengagement and prioritization of personal reputation over victim's life.
Key Takeaways
Secret extramarital relationships can create high-risk situations where fear of exposure leads to neglect of medical emergencies. Early recognition and intervention in sudden health crises are critical. Investigations benefit from digital evidence and CCTV to reconstruct timelines and relationships.
AI Case Q&A
What early signals mattered most?
The secretive nature of the relationship, frequent late-night visits, and the victim's sudden vomiting and unconsciousness were early signals of distress.
Which clues helped connect the case?
CCTV footage showing dragging of unconscious victim, tablet PC photos, frequent apartment visits, and phone call records helped connect the case.
Which evidence types appeared strongest?
Strongest evidence included CCTV recordings, digital photos on tablet PC, phone call logs, and medical autopsy reports.
Witness / Eyewitness Statements
Not reported.
How did follow-up reports change the understanding?
Initial court ruling found no causal link between failure to rescue and death; prosecution appealed and sought additional expert opinions to reinforce causation.
What remained unclear?
Exact timing and mechanism of internal bleeding progression remain unclear; whether dragging and handling contributed to hemorrhage is uncertain.