Heat a large nonstick skillet over medium; add the chorizo, and cook, stirring occasionally, until the sausage is browned, about 5 minutes. Remove the chorizo from the skillet with a slotted spoon, reserving the drippings in the skillet; drain the chorizo on paper towels. Add the onion and bell pepper to the reserved drippings in the skillet; cook, stirring occasionally, until slightly softened, about 5 minutes. Add the rice and garlic; cook, stirring often, until the rice is lightly toasted, about 1 minute. Add the wine (see Note), and remove from the heat. Pour into a 6-quart slow cooker; stir in the stock, tomatoes, salt, turmeric, and chorizo. Cover and cook on HIGH until the rice is tender and the liquid is almost absorbed, about 3 hours.