Cook the sausage over medium high heat, then melt the butter over medium heat.
Add the flour in 3 phases and stir until the roux turns a deep brown. Add peppers, celery, and onions.
Add the roux and vegetables to the slow cooker along with the chicken broth, diced tomatoes, and okra. Stir.
Place the chicken breasts and cooked sausage in the slow cooker.
Place the lid on the slow cooker. Cook for 3-4 hours on High or 7-8 hours on Low.
Remove the chicken from the slow cooker and shred.
Add the raw shrimp and shredded chicken to the slow cooker.
Cook for a few minutes until the shrimp turns bright pink.