It began with a fire. A man driving through an upscale neighborhood in Washington, D.C., in 2015 spotted smoke pouring from one of the homes. It was the first sign something terrible had happened on Woodland Drive. This episode is written and produced by reporters Megan Cloherty and Jack Moore. Julia Ziegler is the content adviser. Visit www.22HoursPodcast.com for photos, maps and an interactive blog. “22 Hours: An American Nightmare” is a production of WTOP News in Washington, D.C. All music featured in “22 Hours: An American Nightmare” is licensed through Creative Commons and/or by permission of the artist. We’re grateful to all the artists whose music has helped us tell this story.“Hater’s Hate” (theme) by Ramone Messam, used with permission of the artist; “Passing time” by Kevin MacLeod, available in the YouTube Audio Library; “Beyond the Lows” by The Whole Other, available in the YouTube Audio Library; and “Bachata Night” provided by Lyrah/Pond5.