Prick the chicken all over with a fork. In a gallon-sized Ziploc bag combine the chicken, garlic, oregano, salt, pepper, red wine vinegar, olive oil, prunes, olives, capers and bay leaves.
Seal the bag and squish everything around for a a minute or two to mix all the ingredients.
Refrigerate overnight.
To cook:
Adjust an oven rack to the upper third of the oven.
Pre heat the oven to 350 degrees
Transfer the contents of the ziploc bag into a 10 x 7 casserole dish.
Sprinkle the brown sugar on top of the chicken.
Pour the white wine around the chicken.
Bake the chicken for 35 - 45 minutes or until the chicken is cooked through. (165 degrees on a meat thermometer placed in the thickest part of the thigh).
Serve the chicken, spooning the sauce and the prunes and olives over the top and garnish with the parsley.