The folks in Sanctuary don’t know about the bad news yet, so Mordecai suggests that you go around and break it to them. This is a simple mission where you just need to go around and talk to Scooter, Marcus, Moxxi and Dr. Zed at first, then Tannis and Brick after those four. You have the option to stick around and listen to their words, but you don’t have to. Return to Mordecai after you’re finished and you’ll finally have access to the red loot chest on the first floor of the Crimson Raiders HQ.