Last week, Hairston was linked to an investigation into an illegal prescription network when SI.com, citing a law enforcement document, reported that in 2004 he was shipped Genotropin, a form of human growth hormone, and two drugs that affect testosterone levels, human chorionic gonadotropin and Clomiphene Citrate, from a pharmacy in Mobile, Ala.
More recently, the S.E.C. has been criticized for routine destruction of some enforcement documents that might have been useful in later investigations.
Court records and law enforcement documents show that several individuals with questionable backgrounds have used the program to launder money and gain entry to the United States.
Ms. Schapiro has overseen a reorganization of the S.E.C.'s enforcement unit, among other reform initiatives, but embarrassing news has continued to emerge, like indications that some enforcement documents were routinely destroyed in recent years.
According to law enforcement documents, the e-mail exchange started on April 4 , 2012 when Thomas Capdevielle, the medical and antidoping manager of the I.A.A.F., sent Fischetto the results of an out-of-competition blood test conducted three days earlier on Schwazer.
Interviews and a review of law enforcement documents show that in recent cases, Microsoft lawyers made statements describing the company as a victim and arguing that criminal charges should be pursued.
Agent Busby met repeatedly with her lawyer, the indictment charges, adding that when she was tried in late 2009, the agent provided her lawyer with confidential law enforcement documents related to her case, in violation of bureau regulations.
Law enforcement documents say the informant told his handlers that an Iranian-American, Mansour J. Arbabsiar, had reached out to him to ask whether Los Zetas would be willing to carry out terrorist attacks in the United States and elsewhere.
From interviews and confidential law enforcement documents, it appears that the hijackers lived at once secretly and in the open, taking advantage of the anonymity and freedom of a society they despised.
In 572 pages of law enforcement documents released Wednesday and first reported by The Pittsburgh Post-Gazette, a friend of the student who accused Roethlisberger of sexual assault told the police that one of his bodyguards dragged the student into a bathroom.
Lulz Security, a group of hackers who have claimed responsibility for a number of recent online data attacks, said Thursday that it had successfully breached the Arizona Department of Public Safety's internal servers, gaining access to hundreds of law enforcement documents, police profiles and e-mails.
