Can you cook frozen brisket

I cook frozen brisket in foil in a slow cooker , I put smoked Applewood rub on it and wrap it in foil and poke a few holes in the foil as to make a stream tent. It will slowly cook awesome!!!!! I do no believe that it make a difference thawed or frozen, however I think it makes it more moist to cook frozen as I shared above and that just a farm girls way of doing it