1. In a medium saucepan, stir together the ketchup, bourbon, ¼ cup brown sugar, and ½ teaspoon smoked paprika. Bring to a boil, then reduce the heat to simmer for 10 minutes. 2. Meanwhile, in a 5- to 6-quart slow-cooker bowl, combine the remaining ¼ cup brown sugar, 2 teaspoons smoked paprika, 1½ teaspoons salt, and 1 tablespoon freshly ground black pepper. Add the pork and rub the mixture all over the meat. Turn the pork fat side up. 3. Pour ¼ cup sauce and 1 cup water into the slow-cooker bowl. Refrigerate the remaining sauce for serving. Cover and cook as the manufacturer directs on the low setting until the meat is falling-apart tender, about 8 hours. 4. Carefully transfer the meat to a large bowl; discard the fat and skin. Using two forks, shred the meat into small pieces. Carefully pour the sauce from the slow cooker into fat separator. Pour the sauce over meat, leaving behind and then discarding the fat. Serve in the buns with the reserved sauce.