 Now to the top stories we're working on at WTOP. A severe thunderstorm warning for parts of Anne Arundel and Prince George's County until 7 o'clock tonight. We will keep you aware on your weather alert station tonight. Authorities in Northern Virginia investigating the third drowning in Lake Anna this year. And what some outside criminologists think of operations at D.C.'s police department. Keep it here for full details on these stories in the minutes ahead.