Hypothetical: what happens when one of suspect #2's accomplices lets him in (he was near his own neighborhood). SWAT comes knocking, accomplice comes to door "with gun slinged" and says "I already checked the house, I will call you guys if I see anything."

If everyone takes this approach, how does this help the situation? It doesn't. I understand the constitution as I protect it every day, but this is a different situation then the government going door to door searching houses for no good reason.