‘Brave Detectives 4’ will reveal the inside story of a twist case revealed by bloodstains.

On the 10th episode of ‘Brave Detectives 4’ (directed by Lee Ji-sun) airing on Tcast E Channel on the 15th, Detective Kim Min-seong, former Superintendent Yoon Oe-chul of the Scientific Investigation Unit (KCSI), and Superintendent Kim Jin-soo will appear and share their own investigation stories that they solved.

The case introduced on the broadcast that day begins with an 80-year-old grandmother found dead in the semi-basement of an apartment building. The deceased grandmother was lying flat on her back with a pillow and a blanket up to her knees, but there were bloodstains all over her body and knife-like wounds on both sides of her neck. A bloody cutter knife was also found next to the body.

At the time of discovery, the front door was locked and there were no traces of water or intrusion, so it was initially assumed to be suicide. In addition, we hear from neighbors that the grandmother, who had been sick and had difficulty moving, often said that she wanted to die, and that the grandmother asked the owner of a restaurant to kill her with a knife in her pocket.

However, the day before the report, a man visiting the grandmother‘s house was captured on CCTV. The grandmother’s call records reveal a man who had called her several times a day, and the fact that the grandmother had been investigated twice as a victim of assault in the past deepens the mystery.

Was the person who killed the grandmother the one who had assaulted her in the past, the identity of the man who visited the grandmother‘s house that day, and the whole story of the incident where bloodstains changed the situation can be found on the original broadcast of ‘Brave Detectives 4’.

Meanwhile, ‘Brave Detectives 4’ airs every Friday at 9:50 PM, and is also available on major OTTs such as Netflix, Tving, and Wave. You can also find vivid news and videos about the program on E Channel’s official YouTube and Instagram.

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