Armstrong said at the time that the leaks were "designed to propagate public support" for the investigation while smearing his reputation.
The federal probe apparently began with an investigation into a small US racing team, Rock Racing, and broadened after confessed dope cheat Floyd Landis claimed Armstrong schooled him in doping techniques when they were teammates.
A statement by US attorney Andre Birotte Jr. said Birotte's office "is closing an investigation into allegations of federal criminal conduct by members and associates of a professional bicycle racing team Nike Air Force 1 Black And Green
fight against cancer without this distraction."
But he became the subject of the probe by federal investigators who were trying to determine if the US Postal team instituted a systematic doping program particularly while it received government sponsorship through the US Postal Service.
The US Anti Doping Agency, however, said it continued to investigate allegations of doping in cycling and hoped to have access to the information gathered in the criminal probe.
(Photo by James Startt)
LOS ANGELES, Feb. 4, 2012 (AFP) US prosecutors said Friday they had dropped their investigation into seven time Tour de France champion Lance Armstrong and other cyclists without bringing criminal charges.
York Times and The Wall Street Journal.
"Mr. Birotte commended the joint investigative efforts of his prosecutors and special agents with the US Food and Drug Administration, Nike Air Force 1 High 07 Black/White the Federal Bureau of Investigation and the United States Postal Service Office of the Inspector General."
owned in part by Lance Armstrong."
Landis was stripped of his 2006 Tour de France title but didn't admit doping until 2010.
"I am gratified to learn that the US attorney's office is closing its investigation," he said in a statement. "It is the right decision and I commend them for reaching it.
Last March, US Congressman Jack Kingston criticized the probe, saying he wasn't sure it was an effective use of resources.
Lance Armstrong Investigation Closed
The probe has reportedly included a grand jury sitting in Los Angeles hearing testimony from former Armstrong teammates and associates. Although such grand jury proceedings are supposed to remain secret, the investigation has been widely reported on, prompting Birotte's office to take the step of announcing it had ended.
"I look forward to continuing my life as a father, a competitor, and an advocate in the Nike Air Force Boys
Birotte did not give a reason for ending the investigation, and praised the agencies involved.
In July, Armstrong assembled a legal team to combat the leaks of grand jury information in the case, targeting investigators as well as media outlets including The New Nike Air Force 1 High Premium Id
Armstrong at the 1991 Tour DuPont.
"The United States attorney determined that a public announcement concerning the closing of the investigation was warranted by numerous reports about the investigation in media outlets around the world," the statement said.
"Unlike the US attorney, USADA's job is to protect clean sport rather than enforce specific criminal laws," USADA chief executive Travis Tygart said. "Our investigation into doping in the sport of cycling is continuing and we look forward to obtaining the information developed during the federal investigation."
Armstrong, who won the Tour de France from 1999 to 2005 and used his fame to fuel his charitable work for cancer awareness, has vehemently denied using performance enhancing drugs during his cycling career.
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