Mr. A, in his 20s, was arrested and indicted on charges of murdering a resident of the upper house during a dispute over inter-floor noise in an apartment in Seo-gu, Daegu. He applied for a citizen participation trial to the court. According to the Daegu District Court on the 29th, Mr. A submitted an application for a citizen participation trial, saying, “I want to receive an appropriate sentence from the citizens who served as jurors.” Last May, Mr. A stabbed Mr. B, a resident of the upper house in his 50s, with a weapon in the elevator of an apartment in Seo-gu. According to the bereaved family, Mr. B's family tried to reduce the noise by placing a noise-prevention mat in the living room and wearing indoor shoes when a complaint was made about inter-floor noise immediately after moving into the apartment in April 2023. However, Mr. A is known to have raised issues with inter-floor noise, such as "the sound of mouse clicking is loud" even though there is no computer in B's house. The bereaved family said, "In May of last year, Mr. A's harsh protest threatened him. “I felt it and reported it to the police,” he said. “When I entered Mr. A’s house to check the noise between floors, there were soundproofing mats installed on all sides of the room.” He continued, “From the beginning of moving in.