Cajun Pulled Pork

This recipe is from A Year of Slow Cooking.
4 pounds boneless pork shoulder
1 tablespoon brown sugar
1 teaspoon cumin
1 teaspoon garlic powder
1 teaspoon onion powder
1 teaspoon red pepper
1 teaspoon smoked paprika
1 teaspoon black pepper
1/2 cup onion, chopped
1 tablespoon butter
2 cups water

Place the pork into the crockpot. In a small bowl combine the brown sugar, cumin, garlic powder, onion powder, red pepper, paprika and black pepper. Mix and sprinkle onto the pork. Place chopped onion and butter on top. Next pour the water onto the pork and sides of crockpot.
Cover and cook on low for 8-10 hours, or until meat shreds easily with forks. Serve on wraps and/or taco shells with lettuce, salsa and cheese.