Case Black is a group I've recently introduced into my DFRPG Sunday game (going for over a year and a half now!)
I've always enjoyed the idea of mortal monster hunters, so I'm revisiting an old idea with some new life specifically flavored for Dresden Files. What made Kincade interesting to me at first was his claim to be a vanilla mortal with a straight face, even though he patently wasn't. Murphy is much the same - just some gal. Even recent events in Skin Game stressed just how firmly the "not supernatural" element to Murphy is, and yet she's still so damn interesting to see cut loose.
So, Case Black.
It started as a simple observation and hobby group, dedicated to "finding the truth," called Paranormal Observations and Studies. They published a few pamphelets and monographs, got ignored, and no one took them seriously. THEY took themselves seriously, and one of their members, a former Mexican Army officer who emigrated to the US, established a series of color-coded "cases" with responses if each case came true. Case Blue was for potential "in the know" sources, Case Red was for being counter-surveiled, etc. Case Black was the "worst case" scenario, ie discovery and attack.
They were discovered, and attacked. Evidently their observations put them on the trail of a Warlock the White Council was after. Trying to get more info from one of their "in the know" contacts, who happened to be a Warden that was using them as a barometer for what information was publicly available, lead to the Warlock getting snicker-snacked. Which lead to the local White Court, who was trying to draw him into their service, getting pissy and having them declared "free game." As half the members (there were never too many) were killed, Lieutenant Alonso declared Case Black and tried to evacuate people. Only four of the original twelve survived. In their frustration with being casualties of Accord back-and-forth, they decided that -all- supernaturals were equally fair game (with a slight preference for not taking on the White Council since they're nominally human friendly).
Taking the name of their previously disdained worst-case scenario, along with the Lieutenant's avowed Trotskyist socialist tendencies, they're in a full out guerilla revolt against the "system" that they see as sanctioned predation on humanity. They keep their membership a tight secret, launch direct-action operations against catspaws and agents of the various supernatural authorities, and in general are trying to erode the underpinnings of "the system," which is in reality the Victor Valley Compact (a set of rules predating the accords, a local set of laws that was incorporated when the Accords came into being as the law of the world). They aren't quite aware of the Accords as a whole, or how widespread the issue is. So far there's seven of them, operating in the local area, and they're starting to attract attention.
Stats are as a basic mortal with some firearms training. Tactics revolve around discreet approach, thunderous execution. Supernaturals outclass humans - operating doctrine for Case Black (and specifically their Direct Action element, the Rain Dogs), is to approach without warning, using flashbangs, incendiaries, tear gas, anything that disorients the enemy. Hollowpoints and large gauge shotguns are the preferred method.
Currently the three players in the Valley are all aware -someone- is jerking them around, though positive ID's haven't been made since Case Black takes care to operate sporadically as possible. Summer hasn't been a direct target since their operations tend to be less overtly predatory. The White Court has, for obvious reasons, seen a number of its useful idiots get gunned down unexpectedly, though they haven't yet lost an actual house member. Even the White Council strongly suspects this "radical group" is responsible for the murder, eight years prior, of a legal expert and minor (yet in good standing) wizard of the Council who was brought in to politely negotiate with the White Court regarding predation rights.