In "Signal" the ending of the Kyeonggi serial murder was revealed.
On the 4th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Jan. 30th, Kim Beom Joo (played by Jang Hyun Sung) started with the investigation briefing of Kyeonggi serial murder incidents.
As Kim Beom Joo was about to present on the results of the investigation, Cha Soo Hyun (played by Kim Hye Soo) came in. Cha Soo Hyun said that she had found an electronic shock machine that Jung Kyung Soon had had, who had recently died. With that, he presented the fact that Kim Won Kyung's blood and fingerprints, as well as Lee Jin Hyung's DNA was found on the electronic shock machine.
In the past on the day that Kim Won Kyung was murdered, Jung Kyung Soon saw that Lee Jin Hyung was dragging Kim Won Kyung away. At the scene of the crime, they had found an electronic shock machine and had continued to threaten Lee Chun Goo.
Recently, Lee Chun Goo had heard that the long term unresolved murder team had gone into a re-investigation of the Kyeongi serial murder incident. With that, he had ended up murdering Jung Kyung Soon.
Meanwhile, "Signal" is about two detectives - one from the past and one from the present who communicate through walkie talkies to resolve long-time unresolved cases.
