From a newsgroup post dated January 5, 2013:

On Usenet there’s a busy thread about high-tech guns incorporating various technology to make them safer or more accountable, and goddammit, now I have the opening scenes of a story in my head.

At first I thought I might have a complete short story, but then I realized that no, it’s the opening of a much longer tale.

So it’s a near-future setting where gun control efforts have taken the form of requiring (or strongly recommending) new guns to incorporate a device that informs the local police any time the gun is fired outside a shooting range, and a camera that goes off whenever the gun is fired, showing what it shot at.

And one dull evening the cop on monitor duty gets an alert — someone has just emptied a .45’s twelve-round magazine as fast as he could pull the trigger. He puts out the word, and a cop car investigates the reported location.

The gun owner’s mangled corpse is there. So’s the gun. They pull the camera’s memory chip, and find twelve images of a cthulhoid monster closing at superhuman speed, untroubled by the high-caliber bullets hitting it…