Yes, there is a smell.
LLS
In any one of these cases the police ought to check the local title records to see who owns the house and their own records to see if any disturbances or other unusual activity have been reported before trying to break in to the house. If the records check reveals nothing out of the ordinary, they ought to knock on the door during day light hours and properly identify themselves before attempting to enter, even if it did mean a few druggies would be able to destroy the evidence. In this case the woman probably heard the attempted forcible entry, feared for her life, and began shooting. The same thing could happen to anyone who lives alone and keeps a loaded weapon for personal protection.