[[Drama 2020] The Flower of Evil, 악의 꽃]

I have a feeling that the accomplice is a totally new character or could be Hyun Soo’s mother that left them ages ago. 
 

New character theory - I don’t think any of the current characters fit the bill of being the accomplice. However I think Baek Man Woo is related to the accomplice. Probably BMW was dealing with the accomplice that’s why he did not respond to any of the real Baek Hee Sung’s calls the night of BHS’s accident. This will really bring the drama full circle if it happens. 
 

Mother theory - I think with Do Min Seok’s personality he won’t work with anyone he doesn’t truly know. So, the accomplice should be someone familiar. Probably the mother also have some mental issues and needed to be hospitalized that’s why she left leaving the kids at a young age and Hae Soo not recognising her but finding her voice comforting. 
 

Well... that’s just my theory... 

 

On a side note, I am also wondering who is the woman the real BHS was supposed to meet that night. Couldn’t it be Cha Ji Won? If it is, I think he will be more motivated to get back his name and live BHS/Do Hyun Soo’s life.