You really watching very detail-ly. Haha...sammyboy.com/posts/2804719
Many thanks for your reply!
I'm going to start watching the sixth episode soon:
en.wikipedia.org/wiki/Voice_(TV_series)#Surim-dong_Chunsoo_Townhouse_Murder_Case_(Ep_6-8) ("The Secret of the Trash House")
dramabeans.com/2017/02/voice-episode-6
viu.com/ott/sg/en-us/vod/38529/Voice