Arandor
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Well, in the description of "Death," mold isn't mentioned as being related to smoke, gases, or anything else. A pistol is also mentioned. So why couldn't the smokers have shot Sunny? And even if the observer is a city official, that doesn't mean he'll cover up the bodies of the bad guys and so on. They're his enemies; why would he do that? It doesn't make sense. Maybe this is just evidence, and the graffiti is a planted clue.
Be strong. Believe