Remember, the door to door search did not find this guy. It was an alert citizen who had already been searched that notified law enforcement.
Report I saw said it was an alert citizen who's house was outside of the search perimeter. Said he'd been holed up in his house, but came outside and saw blood on his boat. Went in and called 911.
I'm really torn on this one. I agree that door to door searches by police absolutely reek of totalitarianism and a suspension of rights. The aftermath of Katrina was a case study on pure, clear-cut violations of the Bill of Rights.
On the other hand, I feel as though this specific scenario was so far removed from anything else we've seen that house to house consensual searches were the only viable response. This was a terrorist, a mass murderer, and a cop killer. He (and his brother) were engaged in real time running gun battles with the cops in which they hurled homemade grenades and bombs at police. This was not the aftermath of an incident, this was a live, unfolding incident.
Our entire system of justice and liberty is based on "reasonableness". Though subjective to interpretation, I have to side with the response being reasonable in balance to the needs of the public to be safe from an incredibly dangerous situation. I also want to believe that those cops had only one goal on their mind and weren't interested in making any chicken-scratch cases on the side. They were looking for the bad guy. Period.