Update: later Tuesday
The WJLA story of home occupant Edwin Gray is here (the story says that it is a family home, below).
Update: March 11, 2015
The Washington Post has a detailed story in the Metro section, p. 1, by Keith L. Alexander here, dated March 10 online. The story implies that Gray's sister, Mozella Boyd Johnson, actually owns the home and is a co-defendant. The plaintiffs are a couple Brendan and Nessa Coppinger, both attorneys (she is an environmental attorney); they have one small child and another on the way. The plaintiffs say they tried to work with the defendants outside the court system first. The engineering information available now suggests that there could be cracks in the walls, and there could be chimney damage. The defendants say this damage could have occurred because of the plaintiffs' renovation. The plaintiffs say they would have helped with the cost of repairs.
To illustrate a point, I looked for a couple cracks in my "own" home. The picture above shows a settling crack in the bathroom. If there were a separate living unit behind it, second hand smoke could pass through. I think this crack appeared in the 2011 earthquake.
The Post story mentions previous litigation in Orange County, CA (where earthquakes could add to second-hand risk), and New York City. How impervious normal sheelrock and other wall materials is to trace amounts of toxic gas (like carbon monoxide) as opposed to colloidal particulate material sounds like a good question.
It did indeed take unusually long for this story, with the potential for setting major precedent in residential use and zoning policy all over the nation. to appear online (in detail) after the initial reports on WJLA.