As part of an ongoing "Uncampaign" (organized group play of many different systems, to get a feel for new and current trends), I'll be running a Burning Wheel game this weekend.
Having only run Mouseguard in the past, this question is soliciting tips for running Burning Wheel in general and running mysteries in Burning Wheel specifically. The Genre is set in something like the "Powers" universe, where the PCs will be mundane cops investigating crimes by supers.
What should I keep in mind when running Burning Wheel for the first time?