Crockpot Pulled Pork Chili

• 1 (2.5) pound pork shoulder
• 2 tablespoons brown sugar
• 1 teaspoon salt
• 1 teaspoon pepper
• 1 teaspoon onion powder
• 8 ounces of beer
• 2 garlic cloves, minced
• 1 shallot, diced
• 1/2 red bell pepper, chopped
• 1/2 green bell pepper, chopped
• 1 (28-ounce) can tomato puree
• 1 (28-ounce) can crushed tomatoes
• 2 (14-ounce) cans kidney beans, drained and rinsed
• 1/4 cup tomato paste
• 4 tablespoons chili powder
• 2 1/2 tablespoons ground cumin
• 1 tablespoon chitpole chili powder
• 1 tablespoon smoked paprika
• 1/4 teaspoon crushed red pepper flakes

for serving:

• Sour Cream or Greek yogurt
• grated cheese
• sliced green onions or chives
• fresh cilantro
• tortilla chips