The Pentagon's definition for "suspected" is significant reporting indicating aperson is involved in terrorist activities and an analysis showing a match to an identity of a former detainee.
Mueller said an FBI profile of the suspected anthrax mailer -- a lone person living within the United States with experience working in labs and smart enough to "produce a highly refined and deadly product" -- had not changed.
The UK has also reopened some historic cases involving dead people, where there are suspected miscarriages of justice - but that did not mean putting a dead person on trial.
Some neighbors and relatives remembered Nancy Lanza, the 52-year-old mother of the suspected gunman behind one of the worst mass shooting in U.S. history, as a retiring person who largely kept to herself.