First find the dead mouse and get rid of it. If it met its end on carpet use deodorizing carpet foam cleaner, if the end was met on a hard surface spray a disinfectant cleaner such a Lysol over the...
Get rid of the mouse and bleach or clean where the mouse died. If the mouse is in a wall or other inaccessible place, you'll have to wait a few weeks for it to dry out before the smell completely...
Well, Id use some candles or air freshiner. Niether does it make the smell go away but it makes your house smell really good!Open the wall and get rid of the mouse. It will get worse before it gets...