Diabetic ketoacidosis can screw up the  Also possible-yeast and bacteria areeverywhere, gets in fluid that's collected at autopsy. Sample left out for 2 hours while people are trying to move her fat ass, sits in the fridge that isn't very cold because it's not in the budget. Yeast ferments some glucose, bacteria do their thing...ethanol. Source:  http://www.clinchem.org/content/53/10/1855.full  Also did autopsies