The perils of relying on a police scanner as a basis for news reports came through in the aftermath of the Boston Marathon bombings. As Slate described, scanner-reporting was responsible for disseminating the wrong names of the suspects in that act of terrorism.

The memo apparently didn’t reach the offices of Washington-based Fox affiliate WTTG-TV. As noted above, it relied heavily on scanner traffic for a number of early tweets on today’s “active shooter” situation at the Washington Navy Yard. The Erik Wemple Blog just called WTTG seeking an accounting of its scanner policy but didn’t get to speak with the news director. We’ll keep trying.