Update 4:20 P.M.
D.C. police say a Holocaust Museum guard, Stephen Tyrone Johns, and the alleged shooter, James von Brunn, were rushed to George Washington University Hospital.
Police have now confirmed that Johns has died.
Police have recovered a torso they believe is Ashley Mead; they say murder suspect may have disposed of her other remains during a multi-state drive
What was the motive in the slaying of a highly respected Florida physician? Erin Moriarty investigates