Question: Who was accused as a suspect in the anthrax attacks of 2001?
About the article "Person of interest", section ""Hatfill v. Ashcroft"".

Candidate passages:
In October 2001, while he was the Senate Majority Leader, Daschle's office received a letter containing anthrax, becoming a target of the 2001 anthrax attacks.
Many of his staffers were confirmed to have been exposed, as well as several of Senator Russ Feingold's staffers and Capitol police officers. 
For six years, the FBI focused its investigation on Steven Hatfill, considering him to be the chief suspect in the attacks.
In March 2008, however, authorities exonerated Hatfill and settled the lawsuit he initiated for $5.8 million.
According to ABC News, some in the FBI considered Ivins a suspect as early as 2002.
FBI Director Robert S. Mueller III changed leadership of the investigation in late 2006, and at that time Ivins became the main focus of the investigation.
The FBI thought Ivins, who had complained about the limits of testing anthrax drugs on animals, might have sent the anthrax letters in order to test a vaccine he had been developing.
After Hatfill was no longer considered a suspect, Ivins began "showing signs of serious strain".
As a result of his changed behavior, he lost access to sensitive areas at his job.
He began being treated for depression and expressed some suicidal thoughts.
On March 19, 2008 police were summoned to Ivins' home in Frederick, MD, found him unconscious and sent him to the hospital.
Late in July 2008, investigators informed Ivins of his impending prosecution for his alleged involvement in the 2001 anthrax attacks that Ivins himself had previously assisted authorities in investigating.
It has been reported that the death penalty would have been sought in the case.
Ivins maintained his security clearance until July 10; he had been publicly critical of the lab's security procedures for several years.
W. Russell Byrne, a colleague who worked in the bacteriology division of the Fort Detrick research facility, said FBI agents "hounded" Ivins by twice raiding his home and that Ivins had been hospitalized for depression earlier in the month.
According to Byrne and local police, Ivins had been removed from his workplace out of fears that he might harm himself or others.
"I think he was just psychologically exhausted by the whole process", Byrne said.
"There are people who you just know are ticking bombs", Byrne said.
"He was not one of them."
However, Tom Ivins, who last spoke to his brother in 1985, said, "It makes sense ... he considered himself like a god".
The "Los Angeles Times" asserted that Ivins stood to profit from the attacks because he was a co-inventor on two patents for a genetically-engineered anthrax vaccine.
The San Francisco-area biotechnology company, VaxGen, licensed the vaccine and won a federal contract valued at $877.5 million to provide the vaccine under the Project Bioshield Act.
However, biological warfare and anthrax vaccine expert Dr. Meryl Nass has expressed skepticism of this purported motive, pointing out that "Historically, government employees do not receive these royalties: the government does.
"On August 6, 2008, a federal prosecutor, U.S. Attorney Jeffrey Taylor, officially made a statement that Ivins was the "sole culprit" in the 2001 anthrax attacks.
Taylor stated that Ivins had submitted false anthrax evidence to throw investigators off of his trail, was unable to adequately explain his late laboratory working hours around the time of the attacks, tried to frame his co-workers, had immunized himself against anthrax in early September 2001, was one of more than 100 people with access to the same strain of anthrax used in the killings, and had used similar language in an email to that in one of the anthrax mailings.
Ivins was also reportedly upset that the anthrax vaccine, that he had spent years helping develop, was being pulled from the market. 
 January 4, 2002: Nicholas D. Kristof of The New York Times writes a column titled "Profile of a Killer" which begins with this sentence: "I think I know who sent out the anthrax last fall."
The column includes quotes from Barbara Hatch Rosenberg.
Seven months later, in July, Kristof will explain in another column that he and Dr. Rosenberg were referring to Dr. Steven Hatfill.
January 29, 2002: The news breaks that the Ames strain is NOT a common strain from Iowa that is used by labs all over the world.
According to The New York Times, "The geographic gaffe was the result of a clerical error by a scientific researcher."
According to The Washington Post, "The bacteria was isolated by the Texas Veterinary Medical Diagnostics Laboratory at Texas A&M University and shipped to USAMRIID in May 1981."
The Ames strain was never in Iowa and will turn out to be a RARE strain, not a common strain.
Instead of being useless to the investigation, it will become critical to the investigation.
February 5, 2002: Barbara Hatch Rosenberg publishes "Is The FBI Dragging Its Feet?"
on the Federation of American Scientists web site.
She says, "The FBI has surely known for several months that the anthrax attack was an inside job."
February 2002: Barbara Hatch Rosenberg writes, "Analysis of the Anthrax Attacks" and posts it on the Federation of American Scientists web site with later updates.
February 22, 2002: FBI spokeswoman Tracey Silberling says, "It is not accurate that the FBI has identified a prime suspect in the case."
February 25, 2002: "Federal law enforcement officials denied a newspaper report that the FBI had a identified a scientist who once worked in a U.S. government laboratory as a chief suspect."
February 26, 2002: "There is no prime suspect in this case at this time," says Bill Carter, an FBI spokesman.
The Washington Post declares, "FBI Still Lacks Identifiable Suspect in Anthrax Probe."
""FBI officials over the last week have flatly discounted Rosenberg's claims."
April 15, 2002: U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) microbiologist Bruce E. Ivins tests more than 50 samples from the men's change room, the area outside the passbox, and his own office, at Fort Detrick.
All three locations test positive for Ames-strain anthrax, with heavy growth on the rubber molding surrounding the noncontainment side of a passbox.
The passbox uses UV radiation to allow personnel to safely transfer materials from labs to outside areas such as hallways.
April 16, 2002: Dr. Bruce E. Ivins notifies the USAMRIID Bacteriology Division chief of the preliminary results from his April 15 sampling.
USAMRHD confirms the contamination April 16.
April 18, 2002: Official testing finds anthrax spores in areas outside containment at Fort Detrick, including Dr. Bruce E. Ivins's office and near a passbox.
A sample taken near the passbox tests positive for more than 200 spores of Ames-strain anthrax.
The testing also reveals spores in a men's change room.
May 9, 2002: A team of investigators led by Timothy Read at The Institute for Genomic Research publishes their findings on the DNA sequence of the anthrax spores used in the attacks.
The report, which appears in the journal "Science", finds that there are no differences between the attack strain and the original "Ames" anthrax strain from Ft. Detrick, Maryland.
June 13, 2002: Barbara Hatch Rosenberg publishes "The Anthrax Case: What the FBI Knows" on the Federation of American Scientists web site.
She says, "Early in the investigation, a number of inside experts (at least five that I know about) gave the FBI the name of one specific person as the most likely suspect."
June 18, 2002: Barbara Hatch Rosenberg meets with Senate staffers and FBI officials.
June 25, 2002: The FBI conducts a consensual search of Steven Hatfill's home.
July 2, 2002: "New York Times" columnist Nicholas Kristof writes "Anthrax?
The F.B.I.
Yawns."
Kristof talks about a "Mr. Z" (later identified as Steven Hatfill) in his column as being someone who the FBI has interviewed and who members of the biodefense community suggest may have been involved in the attacks.
July 12, 2002: Columnist Nicholas Kristof writes "The Anthrax Files" suggesting his "Mr. Z" may have been part of several anthrax hoaxes in the past.
August 11, 2002: Dr. Steven Hatfill holds an outdoor press conference in Alexandria, Virginia and declares his innocence and noninvolvement in the anthrax attacks.
December 14, 2002: The U.S.
Postal Service begins to decontaminate the Brentwood mail facility 14 months after it was closed.  
In addition to attempts to link the anthrax attacks to Iraq, efforts were being made by some to implicate both al-Qaida and another alleged Axis of evil member, North Korea.
Gillan wrote, "Intelligence sources believe that Bin Laden operatives have been preparing for spectacular terrorist strikes using biological weapons for a number of years.
It is believed that viruses causing deadly diseases such as ebola and salmonella were procured in Russia and that anthrax was obtained from North Korea."
Again, the sources were not named.
Letters included in the anthrax-containing envelopes attempted to link the anthrax to international terrorism, but the strain of anthrax used in the 2001 anthrax attacks was khown to be one used within the United States biological warfare program, not one known to be available to countries such as Iraq. 
Years after the attack, several anthrax victims reported lingering health problems including fatigue, shortness of breath and memory loss.
The cause of the reported symptoms is unknown.
A 2004 study proposed that the total number of people harmed by the anthrax attacks of 2001 should be raised to 68.
A postal inspector, William Paliscak, became severely ill and disabled after removing an anthrax-contaminated air filter from the Brentwood mail facility on October 19, 2001.
Although his doctors, Tyler Cymet and Gary Kerkvliet, believe that the illness was caused by anthrax exposure, blood tests did not find anthrax bacteria or antibodies, and therefore the CDC does not recognize it as a case of inhalational anthrax.