 Scott Gelman, WTOP News. Almost a month now after 25 swimmers got sick, health managers in Virginia are closing an investigation into the E. coli outbreak at Lake Anna. You remember that outbreak was on the Memorial Day weekend. Here we are just ahead of the 4th of July. WTOP's Mike Murillo reports that the health department has done a new round of tests in the water. At Lake Anna. It's been more than 20 days, which is two days.