[2 DA WDS]

We have the side by side Dometic fridge. At the bottom back inside the freezer there is a drain hole and little 'trough'. There is a reddish brown liquid that gathers there that stinks. There is nothing else in the fridge but ice and the ice maker. Anybody know what this could be? Leaking refrigerant? I'm guessing it must be coming from behind the panel that is on the back wall inside the freezer.