Investigators sent the letter to an Army biomedical research lab for forensic tests that they hoped would help solve the baffling case.
Dr. Hatfill's emergence comes as the larger F.B.I. investigation into the baffling case seems to be going nowhere and the agency is under heavy pressure to make progress, especially as the anniversary of the mailings draws near.
But today, Michael Birnbaum, QC, for Ban, said: "This remains a baffling case.
It's a baffling case, prompting a range of questions: Were they abducted or were they on the run?
On Wednesday, state prosecutors charged Michael C. Skakel with killing 15-year-old Martha Moxley in Greenwich almost 25 years ago, in a blaze of media coverage, tight-lipped but confident they had finally solved a baffling case.
Now, an old Ross bike is at the center of a baffling case involving what the police believe may be a serial bomber who has caused three explosions in Midtown Manhattan since 2005.
Charlie Evans, in Evans estate agents, has had fewer inquirers than usual this week, but several had rung to call off or postpone deals; in one baffling case, she said, a potential seller wanted to take a house off the market because prices might fall.
In a baffling case that seems like it could only happen in some kind of horrifying police state, a man in Oregon has been held against his will for 900 days even though he's not being charged with a crime.
Now released in an updated and expanded version, it casts players as Holmes' agents, working together to scour the streets of London and crack a succession of baffling cases.
Palm in hand, he uses medical software, including Medmath, to calculate commonly used formulas; 5-minute Clinical Consult for baffling cases while on call; and Epocrates for drug information.
The results obtained for rigid baffle case are comparable with the existing results.
