The game is completely solvable with no guessing.
There is also no indication in the game of who killed John Naples.
Spoiler alert?
Men wearing steward uniforms frequently hanging around officers do tend to be stewards.
> There is also no indication in the game of who killed John Naples.
Probably the Swedish-speaking man being hauled away from the bloody sword to the lazarette while the captain shouts that he was “twenty years my steward.”
These are not guesses.