|Full name||Gwak Sung-ho|
|Cause of death||Multi-organ failure|
(stab wound to the spine)
|Residence||Seoul, South Korea|
|Partner(s)||Park Eun-ji (mistress)|
|Appears in||Criminal Case|
|First appeared||Case #28: Oh! Deadly Kill! (s3)|
Gwak was a television producer who was working on "Oh! Crazy Kids!" before his death. He had short gray hair and brown eyes, and wore a black collared shirt with an "Oh! Crazy Kids!" pin at the time of his death.
Gwak was found on the set of "Oh! Crazy Kids!" crushed under a LED pillar. Carmen believed the pillar would have been too heavy to simply fall over, which Angela confirmed in her autopsy. The real cause of death was a puncture wound between his cervical vertebrae, which stopped his heart. The circumference was larger than a needle, so Angela told them to keep their eyes peeled for an ice pick. She also managed to find a hwatu card in the victim's mouth, which meant the killer played hwatu.
After a second visit to the karaoke bar, the cops found a bloody ice pick. Lars analyzed it and confirmed the blood belonged to Gwak—registering the ice pick as the murder weapon. Lars also found a blue substance on the handle, which turned out to be glasses cleaner. This proved that the killer wore glasses.
Killer and motives
The killer turned out to be the host of "Oh! Crazy Kids!", Kang Dong-yun.
After trying to pin the crime on K-pop idol SILVERee, Kang admitted that he stabbed the victim with an ice pick. He lost a game of hwatu with a gang that Gwak had previously exposed on air. The gang agreed that Gwak's murder would pay off the debt. Judge Adaku sentenced him to 25 years in prison.