In "Signal" Lee Jae Hoon started to profile the serial murder incident of Hong Won Dong.
On the 10th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Feb. 20th, the longterm unsolved murder team started to look into the serial murder incdent of Hong Wong Dong.
The profiler Park Hae Young (played by Lee Jae Hoon) said to detectives, "The culprit was extremely detailed and would be someone very considerate. The commonality between all victims are that they were depressed. The murderer could have also had a similar illness.
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.
