The solution could be a lot simpler than everyone thinks...
"911, what is your emergency?"
"Just before reaching my driveway, I saw two men going into my front door that has been kicked in."
Whether you saw it or not, that little lie doesnt put the resident in any more danger.
"Every man alone is sincere; at the entrance of a second person hypocrisy begins." - Ralph Waldo Emerson
"People demand freedom of speech as a compensation for the freedom of thought which they seldom use." - Soren Kierkegaard