SAN FRANCISCO An investigation into the sourcing and accuracy of news stories by a freelance journalist at a leading Internet news site concluded that the existence of dozens of people quoted in the articles could not be confirmed. Wired News, which publishes some articles from Wired magazine, paid for the review of stories by one of its frequent contributors, Michelle Delio, 37, of New York City. It was expected to disclose results late Monday. The review determined that dozens of people cited in articles by Delio primarily during the past 18 months could not be located, said one person familiar...