Rinse and sort through the dry beans, sort out any debris and discard. Add the rinsed beans to the slow cooker.
Add the cooked turkey, onion, celery, poblano pepper, bell pepper, oregano, pepper, liquid smoke, and water. Pour over the water and stir. (Wait to add the tomatoes and lemon juice).
Cover and cook on HIGH for 7 hours without opening the lid during the cooking time. Add the crushed tomatoes, lemon juice and the Cajun seasoning packet, stir. Add salt if desired.