An investigation into the cause of smoke that killed one person and injured dozens on a D.C. Metro train could take six to 12 months, a National Transportation Safety Board spokesman said Tuesday.
Metro also identified the passenger who died as Carol Inman Glover, 61, of Alexandria, Va.
Eighty-four patients were taken to hospitals and more than 200 people were evaluated after smoke filled a subway tunnel and L'Enfant Plaza Metro station on Monday.
As of Tuesday evening, two passengers were still hospitalized at Washington Hospital Center, one in serious condition and one in fair condition, a hospital spokesman said. Four patients had been released.