The Ripper

It's fairly enigmatic. The aviators obscure my face just as the night obscures my surroundings. I could say that this was an effort to be mysterious, but the real explanation has more to do with my own noncommittal nature. The less of myself that is defined, the more of it that is obscured, the more flexibility I have, as I can fill in those obscurities on the fly to suit my needs. So am I a serial killer? Am I a spy? A thief? Stoned out of my mind? What key fits in that keyhole?