Mix all dry rub ingredients together. Rub the spice blend all over the pork roast and refrigerate overnight.
Preheat oven to 325 degrees.
Combine all braising liquid ingredients in a large dutch oven then add the pork roast. Cover tightly with aluminum foil then tight-fitting lid and roast for about 4 hours. Flip the roast over once during cooking so that it cooks evenly.
Remove from oven and let stand until cool enough to handle. Shred the pork with a fork and remove any visible fat (they won't be much).