Drain, but do not rinse the kraut. Reserve 1/2 cup kraut juice for the bottom of the crockpot. Pour in the reserved kraut juice. Layer half the kraut in the crockpot. Drain the tomatoes, roughly cut, and place half on top of the kraut layer. Sprinkle with half of the brown sugar. Repeat layers in the same order, ending with brown sugar on top. Cover and cook on high 4-5 hours. If using Chicken sausage as I suggested, lay them on top of the lowest layer of brown sugar. AND, if using chicken sausage, INCREASE cooking time to 5-6 hours total. This is good served with any kind of potatoes.