Soak the beans overnight. Place beans, onion and garlic in the crockpot with enough water to cover the beans completly. Cook on high for 6 hours, 8 on low. After the beans are tender fill the crockpot the rest of the way with water.
In a skillet add ingredients in this order. Oil, onions,garlic, peppers, tomatos, and pork rinds. Cover and cook on medium high for about 10-15 minutes. Until the pork rinds are completly soft.
Add this skillet mix to the crockpot and simmer 10 more minutes. Salt dish to taste. Add the cilantro just before serving.