Add the beans to a colander and sort through, removing any debris. Rinse and place in slow cooker.
Dice the onion,garlic, and jalapeno and place in the slow cooker with the beans.
Place the trimmed chuck roast over the top of the beans and sprinkle with half of the chili seasoning packet.
Pour the beer and water into the slow cooker and cover.
Cook on high for 5 hours.
Shred the roast with two forks. Stir in the tomatoes, tomato paste, salt, pepper, and remaining chili seasoning.
Cover and cook on high for 1 more hour.
Serve with sour cream, cheddar, green onions, crackers, etc.