On July 29, I published an investigative report on the campaign car of Jim Walden, the now-former independent candidate for Mayor of New York City. Some people who read that article may call “foul” on my describing what I wrote as an investigative report. To be sure, the article was centered on my photographs of Mr. Walden’s campaign car, which was parked in a very open-to-the-public location in Brooklyn Heights, where Mr. Walden reportedly lives. Moreover, most of my additional comment...