I think thatbthe skeleton is the sister....remember he has an older sister...the skeleton had on a white dress…
were there not 3 necklaces? i think there was a scene with a photo of the sister and two boys. And one boy gave the necklace to Joon jae cause Crazy Dog took his away. Right? I know the sister is dead, but wasn't she found already dead maybe?
I wonder if the real Joon Jae is dead? Cause we saw the skeleton from someone with a necklace in episode 8. I really can't say who is the real killer. Everyone is not innocent.