Indeed, the government spent plenty of time and resources investigating Armstrong. Federal prosecutors traveled to Europe and met with foreign officials and they called some of Armstrong's former teammates and associates to testify before a grand jury in Los Angeles.
Government officials declined to say how much money was spent on the Armstrong probe.
Going forward, some legal experts said, the government's time may be better spent prosecuting other crimes — rather than sending a message to the professional sports community.
"In light of this decision and the Bonds and Clemens investigations," Rosengart said, "the government may be more willing to defer to the regulatory agencies to police alleged misconduct of athletes."
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