The Mayor of Baltimore spread a false rumor this week about kidnappers prowling the city in white vans, citing postings he saw on Facebook. Still, the media covered it as news.

On this week’s edition of Beat The Press, Emily Rooney was joined by former Wall Street Journal reporter Roy Harris, Lylah Alphonse of U.S. News & World Report, Dan Kennedy of Northeastern University, and Callie Crossley of WGBH News.