The real investigation log of the brave detective who dramatically found the culprit after a long 81-day investigation will be revealed.

On the 14th (Friday), the detailed investigation process of Superintendent Kim Yeon-soo, the head of the criminal investigation division of the Daejeon Central Police Station, will be revealed on the episode of ‘Brave Detectives 4’, which will be broadcast on the Tcast E Channel, a media affiliate of Taekwang Group.

Detective Kim Yeon-soo, who received a 112 call and rushed to the scene on her day off, found the owner of the teahouse covered in blood. The owner of the teahouse had been stabbed in the abdomen and had a hernia, and was holding a knife presumed to belong to the culprit in her hand, and was immediately transferred to the hospital.

The underground teahouse was connected along the bloodstained stairs, and another woman was found dead in the bathroom at the scene. The body of the woman, whose stockings and underwear near her buttocks were torn, exposing her skin, had half of the front of her neck cut off. After confirming the gruesome condition of the body, the detectives began to suspect a sexual crime.



Meanwhile, a clear fingerprint was found on the bathroom door where the victim died. The owner of the fingerprint was a regular customer of the teahouse with seven previous convictions and was presumed to be the first suspect, Mr. Oh. However, bloody tissues and clothes that the criminal was thought to have thrown away while escaping were found, but they did not match the suspect‘s DNA found in the bathroom.

A black jumper found at the scene contained eye drops that required a prescription and a knife. The detectives, who assumed that the jumper belonged to the criminal, requested an autopsy, and the results revealed the DNA of two female victims and a total of three male blood type AB victims.

Based on the statement of the teahouse owner who dramatically survived, a list of all the people who had prescribed eye drops between the ages of 20 and 40 was compiled, and about 500 people were on the list. While the DNA comparison work continued through the night, a cautious call came from the National Forensic Service.

Just when the investigation was about to run into trouble, what was the content of the call from the National Forensic Service? The SF investigation log, which chose a method completely different from the investigative techniques known so far, can be seen on Tcast E Channel at 9:50 p.m. this Friday.

Reporter Choi Yoon-na, Donga.com yyynnn@donga.com

This article is automatically translated using Google AI. If you notice any inaccuracies, please let us know at allkstar@donga.com.