The story:
Inside a police parking garage, a police sergeant puts an AR-15, magazine inserted, on the trunk lid of a cruiser (not his own), forgets, and walks away. Another cop, a lieutenant gets in that cruiser without noticing the rifle, drives away, goes onto city streets, parks, and leaves the car -- and the rifle -- at the curb. A passer-by notice, snaps a picture, and eventually flags down a couple bicycle cops. Another passer-by also notices and finds another police officer (perhap the driver, not sure).
According to a police spokesman, "... it is a violation of the department policies to leave a weapon unattended, but not a criminal violation." What!?!

Picture at link.
I have read several newspaper accounts (stories and newspaper blogs) of this, and the rifle is always identified as an "AR-15," or "semi-automatic rifle" or "rifle," or "weapon," or occasionally "high powered," but never as an "assault rifle/weapon." This burns me up almost as much as incident itself. I'd be happy if I thought at least one newspaper had finally caught on to anti-gun political spin, but a quick search of the Seattle Times website disabused me of this notion.