So some of this will be explored in future pages, but for now and without giving away too much stuff that can be learned in-game... The KW branch of the PPD was incredibly corrupt and was basically disbanded entirely to eventually be reconstituted from scratch. Emil Christie, a billionaire who has a lot of influence in the Wharf, worked out a deal with the city to hire BWI to provide security in the Wharf in the meantime. BWI has recently opened up shop there, but they are still starting their work. For now, they are focusing on the gangs that are causing havoc in the Wharf. Villains are a problem, yes, but not the primary issue as long as they aren't actively attacking BWI or otherwise causing problems they are contracted to respond to. Heroes in the Wharf don't attack villains for the same reason they don't attack rogues in other parts of the city, even if the rogues are still perfectly capable of (or even actively are) committing lots of crime. Because *coughcoughcough*.