In a bowl, combine the ketchup, tapioca, and orange juice. Put about half in the bottom of your slow cooker. Place the cinnamon stick on top of the sauce.
Put a single layer of chicken in the pot, spoon some sauce over each piece, add another layer of chicken and sauce. Repeat if necessary.
Cook on low 6 – 8 hours, or high 3 - 4 hours or until chicken is done.
Recipe by The Gluten-Free Homemaker at http://glutenfreehomemaker.com/citrus-cinnamon-chicken-in-slow-cooker/