Ok, now I'm super confused. I didn't just assume yesterday's fire was a firebug. I figured it was more likely a cigarette butt flicked from one of the apartments or something.
Anyone who knows the ladder is going to wonder how or why someone would light a fire there. There are always people on the ladder who would witness it. From before sunrise to after sunset, you could never assume you'd be alone there. You'd be caught so quickly, like this dude.