Possibly. However, we haven’t heard from Burbaris on the stand yet, since the trial hasn’t started. He might have punched Perez and just left him to walk back to town himself. However, he has to prove that punching Perez, in and of itself, didn’t not cause Perez’s death (although the autopsy, Peltz’s footage, and Burbaris’ absence don’t look good...although the later MIGHT be cleared up if he can find any witnesses at the train station who saw him).
If you are going to follow this case please feel free to ping me any updates and new articles. I am interested in seeing how this one turns out.