Are you assuming the police are stupid? I am not. They obviously know anything they found in the searches will be tossed out of court, so there would not be charges no matter what they found in their illegal searches.
You don't suppose that maybe the cops doing the searching for a mad dog killer like this might have had their minds on CATCHING HIM ~ or at most doughnuts ~ they did leave some donut shops open for them.
You did know there were cops being shot by the perps ~ and cops traditionally don't like that.