Police found what appeared to be a suicide note and a charcoal briquette at the scene in Seongbuk-gu, Seoul, where a man in his 50s allegedly killed a teenage girl who was the victim in a sex crime case involving his son.

According to Seongbuk Police Station and other sources on November 11, police made an emergency arrest of the man, identified only as A, at about 1:40 a.m. (KST) that day. He is suspected of killing the teenage girl at an Airbnb lodging in Jeongneung-dong, Seongbuk-gu.

Police also found a document believed to be the suspect's suicide note, the weapon used in the crime and a charcoal briquette at the scene.

Police received a report at about 1:25 a.m. (KST) that day and responded, but the victim, identified as B, was already dead. The caller was reportedly a third party, not the victim.

Police tried to question A for the first time that afternoon but could not, because he was in no condition to be questioned. A was heavily intoxicated when he was arrested.

Police plan to investigate the motive and circumstances of the crime through an autopsy, analysis of evidence and a review of his movements on closed-circuit television (CCTV) footage. They will examine whether A prepared the weapon in advance and whether the killing was an act of revenge. Police also plan to seek a detention warrant for A once questioning is complete.

B was identified as the victim in a sex crime allegedly committed in January by A's son, who is in his 20s. B was under 16 at the time, and her parents filed a complaint against A's son on sex crime charges.

In March, Seoul's Nowon Police Station, which investigated the case, referred A's son to prosecutors (now the Prosecution Office) without detention on suspicion of statutory rape of a minor.

According to police, B said at the time that she had not been victimized and did not want him punished. Police reportedly determined there was little need to seek a detention warrant, taking into account grounds for detention such as the lack of a fixed residence.

The Prosecution Office is investigating the sex crime case involving A's son. The Seoul Northern Prosecution Office transferred the case to the Seoul Western Prosecution Office on April 22. In a notice on November 11, the Seoul Western Prosecution Office said, "The case is currently under investigation."

Police found what appeared to be a suicide note and a charcoal briquette at the scene in S …

Tragic Murder in Seoul: 50-Year-Old Man Kills Teenage Victim of His Son's Crime