OK, here's the first question. You have 5 seconds to answer: You're the police and you get a run to a house on shots fired, children screaming.
Like columbine? I think that the police took a couple of hours to "regroup" before they went in. Sorry to bring that up but it's the truth.
After rereading your post, I can't see where that would be unconstitutional to see what is going on and reacting upon it. Hell, we, civilians, have the same right to intervine in a felony while it's taking place. What does that have to do with this? Substitute you for me, we both have the right to stop a felony if we see it. Also, many states, including mine have a good samitian(sp) law which says that I have to intervine in such a sitution.
So how is this in relation to gathering evidence illegally or unconstitutionally when this post that you've done just makes it human nature to help when you can in such a situation?
You hear someone in trouble, you go and help. If they happen to have things that man has deemed illegal, you look the other way, help them in the situation, and carry on. I would as a civilian that has to help via law. I don't obey that law because it's law, I do it out of morality.
Wayne