Just curious, how do you peg him as Chaotic? I could arguably agree that Lawful might not fit the best because of his vigilantism and willingness to (nay, near obsession with) work outside the law, but nothing about his behavior or personality screams freedom or chaotic to me. I would very much label him as Neutral Evil, as someone else suggested, or even Lawful Evil (in the vein of the "for the Greater Good but at any cost" mindset).
Again, just curious. I'm open to the idea of CN or CE, I just don't see it from where I'm sitting. (Which is on a milk crate currently, so the view is sh!t.)