Talabheim is in quite the buzz as of late. A series of murders plaguing a Noble family of some notoriety, a search being conducted over the streets for a cultist, and the rather public chase through Talabheim's streets has caused rumors and gossip to fly about faster than any messenger bird could manage. The official story is that the Longshanks tracked down and successfully took down a Magus of some sort of Cult, and that their efforts won them the day.
The truth is altogether more complicated, but unfit for the public eye. What few know is that the Cultist in question was of some importance, though none recognised him, and that he was not alone. His corpse yielded no clues, but to the Ulrican City Watch, labelled the Dogfaces by the public, this situation holds great value. A particularly sharp watchman acquired some clues as to who might have supported this Magus, and he is looking for some individuals who could work outside the bounds of the law. The Watch cannot allow themselves to be upstaged by the Taalites, but they couldn't afford to show their hands either.
Whether these clues provide a usable lead into the identity of the supposedly Slaaneshi Magus and his Cult, or whether the watchman in question is genuine in his investigation, is still up in the air. It is up to the PCs to find out.