What they find about these mugs is that they're generally unmarried men around 27 years old, and they travel solo--few if any friends, and none they'll confide in. They feel like the city has betrayed them, or that they're the mark in some crazy con--which makes them a little more dangerous than your average firebug. They're seeking some kind of revenge for a sleight they feel--which may or may not be real. Don't get us wrong, the guy isn't a total boob--most Revenge-based arsonists are well educated, but he still works a pretty menial job.
There's also a chance they've tried to pull the Dutch act, or have some psychological history; not to mention odds are good they have a criminal record. Probably also huge fans of the giggle juice, may even seek some confidence from the stuff (looks like Centre Street Liquor may be safe). They know their scenes well, usually within two miles of their home or work--and odds are very good (As we've discerned with this case) that he has a car. These cases also tend to be intra-racial--so in our case he probably feels like the grifters were the Hispanic residents of our fair neighborhood. What is also interesting is that most of these kinds of hotheads won't stick around to watch their fire, but they'll be back the next day to check their handiwork over.
The standard profiles more or less back up what we've got, and adds a few new elements to the mix. We have his history of addle-brainedness and a possible criminal past. A taste for alcohol, and the education. It's also pretty likely that he was using a lighter, as these jobbies are as likely to drop a matchbook on the ground as they are to breathe.
Here's a photo of the perp in action, courtesy of BPDNews.com
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