In the YT video you can clearly see, that after fully completing the game and achieving the "good" ending, I've reloaded the game from Prescott's apartment then running straight to the elevator and still got "survivor" ending... while a policeman laying completely dead in the foyer, lol.
https://www.twitch.tv/videos/2082404102 - here, a full twitch VOD. Watch from 00:45
and edited piece of VOD:
I've tried reloading multiple times and getting the same thing every time. This moment, the first "reload", is still on the yt video, I've just cut the rest straight to when I restored my other save files.