Had a young guy knock on the door and ask if I wanted a "free carpet cleaning" because he was in the neighborhood. I said no, but should have asked for a business card. Then I watched him walk down the street, skip several houses with cars out front and knock on another door (those people are out of town). Finally, a green ford mini van with 3 other guys picked him up and they took off down the street. Called police dispatch and gave them a license plate # -there was no carpet cleaning truck or van, no id, and I think they were casing the neighborhood. Hope they are gone.