I knew it.

I knew there was something suspicious about the corrupted data few chapters back. The transition also got me confused but I think theyre 2 diff people; so the guy Ah-In met to recover the videa proof lied & kept the data to himself, and apparently he has an abusive boyfriend he wants to get rid off.. so im thinking thats why he called the serial k writer to blackmail him or make a deal. Then the guy serial k writer brought home is one of the police patrol that saw them the night before so currently Ah-In has no witnesses/security assurance anymore