Teenage daughter who killed her mother, shocking motive: "I wanted to go to Seoul National University" [Yonghyeong5] [Comprehensive]

*This content was translated by AI.

'Brave Detectives 5' revealed the full details of a crime committed by a teenage daughter who murdered her mother.

'Brave Detectives 5' Episode 6, broadcast on the 1st on TV Cast E Channel, featured Detective Lee Gyeong-ro of the Women and Juvenile Investigation Team at Bupyeong Police Station, former Police Superintendent Yoon Wae-chul of the Criminal Investigation Division (KCSI), and Officer Kim Jin-su, who presented their investigation logs.

'The first case introduced that day was a shocking murder that occurred in a household. At the time of the incident, the eldest daughter reported to 119, saying, "My mother isn't breathing." A woman in her mid-40s was found dead on a bed, face down. There were no external injuries, but blood had pooled in a circular shape where the mouth of a dark-colored mattress with a large floral pattern had been. Sleeping pills were found in the master bedroom, but the autopsy revealed the cause of death was asphyxiation caused by blocking the nose and mouth.

Upon confirming with the husband, it was learned that there had been family conflict over the eldest daughter's tutoring academy. The eldest daughter had dropped out of high school with the goal of attending Seoul National University and was attending an expensive academy costing 4 million won per month, clashing with her mother who opposed this. Most notably, inconsistencies were found between the mother-in-law's movements when she returned home on the day of the incident and the eldest daughter's statement. The decisive clue was the bed sheet. Detectives who realized the sheet was missing confirmed bloodstains on the sheet washed by the eldest daughter at the same location as the mattress through the National Forensic Service. The victim's DNA was also detected. The person who staged the scene to look like an overdose of sleeping pills was the victim's eldest daughter, Ms. Choi (pseudonym).

The investigation expanded to the academy. The academy was operated by the family, and the eldest daughter attended a special class run by Vice Principal Jang (pseudonym). During this process, it was revealed that the vice principal took bribes, causing a rift with the principal, leading to a physical assault incident where the vice principal came to the principal's office wielding a baseball bat.

The father said that Ms. Choi became a completely different person while taking classes from the vice principal. When his wife ordered her to stop attending classes, the eldest daughter ran away and did not even contact the family for several months. Later, as a condition for contact, a one-room apartment was rented near the academy, but she also stayed with the vice principal and other students. During this period, the incident of assaulting the principal occurred. The mother went to the principal's office and asked for help to bring her daughter home, which is how Ms. Choi returned home.

After holding her mother's funeral, Ms. Choi even told her father that she should sell the house to raise 200 million won and give it to the teacher. The incident led to another murder. Seven months after the incident, the academy principal went missing. Through vehicle investigation and witness statements, it was revealed that Jang stabbed the principal with a weapon and Ms. Choi assisted. Jang said she became angry, feeling it sounded like a threat, when the principal suspected her involvement in the murder of Ms. Choi's mother. Ms. Choi stated that she only accepted the teacher's suggestion.

Regarding the motive for killing her mother and the principal, Ms. Choi said, "I wanted to go to Seoul National University" and "My mother said it was because of money," yet she continued to defend Jang, saying, "The teacher is not guilty." Profiler Kwon Il-yong analyzed, "People find psychological vulnerabilities, provide support, groom them, and gaslight them, which leads to absolute trust." During the trial, fake news insulting the police and the father was created by Ms. Choi's younger sibling and students who followed Jang. This was revealed to be instigated by Jang. Both Jang and Ms. Choi were sentenced to 20 years in prison.

Next, the case introduced by KCSI began with a missing person report of elderly parents disappearing in the dead of winter. It left a major question mark due to "something" that vanished completely along with the missing persons. The reporter was the eldest son, who visited the house to hold a memorial service but filed a missing person report when he could not find his parents. Although the lights were on in the yard, there were no signs of external intrusion inside the house, such as bedding being spread out. The location of the keys used when going out remained unchanged, suggesting the parents had left the house voluntarily.

Most notably, the situation was that the female cow raised in the barn in the yard and the tied-up dog had both disappeared. Due to the small village having only seven households, securing witnesses was not easy. Over 250 personnel, including the investigation team, mobile squad, and fire department staff, were deployed, and detection dogs and helicopters were mobilized for the search, but no traces of the elderly couple were found. The investigation focused on the possibility of a crime targeting the cow. A suspicious number was found in a notebook carefully kept by the grandfather, where the name written in the notebook did not match the actual owner, and a note saying "paint" remained. Through tracking, a man in his 30s with suspicion of theft was identified as the suspect.

Analysis of the man's HyeDaejeon call records and cell tower data revealed that exactly one second of HyeDaejeon usage was recorded near the elderly couple's house in the early morning of the day before the missing person report. The call recipient was a woman in her 40s, the man's mistress, and it was also revealed that the man handed over nine 100,000 won checks. Upon checking the check issuance records, it was confirmed that the man had exchanged ten 1,000,000 won checks at a bank near his residence. After lying in wait, the man was urgently arrested and confessed to 17 thefts, claiming he went to steal items. As the investigation narrowed, requesting an arrest warrant and verifying the source of the 1,000,000 won checks, he eventually confessed to the murder of the elderly couple.

It was revealed that he visited the house to steal a cow he had noticed while coming to paint, but when the dog barked and he was discovered, he used painting work as an excuse to take the elderly couple into his vehicle, kill them, and abandon their bodies in a roadside drainage ditch. After the crime, he returned home to try to dispose of the cow, but since the livestock market was not open, he waited and called his mistress before abruptly hanging up. Regarding the motive for the crime, he claimed it was to raise hospital fees for his wife who was about to give birth. Yoon Du-jun expressed his sorrow, saying, "My heart aches so much" while recalling the victims, and Kwak Seon-young also expressed anger, saying, "It's heartbreaking." The perpetrator of the case was sentenced to life imprisonment.

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*This content was translated by AI.