What happens to the antagonist if you sacrifice Arcadia Bay?

Does anyone know or care to speculate as to what happens if Max sacrifices Arcadia Bay and choses to save Chloe??

Does the antagonist get away scott free?? Or does he go to prison?

Solution 1:

According to the BIG timeline picture, the antagonist is arrested:

After being rescued by David from the Dark Room (at this stage Chloe has been killed), Max uses the photo made outside the Vortex Club to get back in the past. Instead of going after the killer themselves, Max informs David about the Dark Room and the killer is arrested. Max meets Chloe at the beach and while the tornado destroys the town, she destroys the butterfly photo. After the storm Max and Chloe leave the town.

Solution 2:

Sacrificing Arcadia Bay is mostly an underdeveloped ending. It ends with a short cutscene of nothingness: 1

Max and Chloe driving away, passing by the wreckage, with a few random people cleaning up in the distance and most (unnamed) residents are presumed dead.

Nothing more is shown and the fate of most characters is generally unknown. (So it's unknown if he gets arrested, died, etc.) The other choice does show what happens to him alongside an entire set of ending cutscenes.