The "investigator guy" is the Korean equivalent of the CIA or NSA, not the FBI...
Destorer5000
2021-10-09 18:13:15 +0000 UTC
Read this if you would like to, I will try not to spoil anything: The 4 victims were the people in episode 4 who helped them to burn the warehouse down. When looking for Dr. Gil they saw that he was dead and shortly after get a suspicious text message from the "victims" saying they did what they had to do. Then we see what looks like a murder/suicide scene using what was used to burn the factory I believe... This would pin the murder of Dr Gil and the burning of the warehouse on them, dead people, case closed.