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Just weeks after famously admitting to doping throughout his career, Lance Armstrong's legal woes are coming into focus. The former Tour de France champion is now under investigation for obstruction, witness tampering and intimidation.

As reported by ABC News, federal investigators are actively seeking to bring charges against the disgraced cyclist. According to sources, "Investigators are not concerned with the drug use, but Armstrong's behavior in trying to maintain his secret by allegedly threatening and interfering with potential witnesses."

If prosecuted and convicted, Armstrong is facing a federal prison sentence.

In June 2012, Armstrong was accused of doping by the United States Anti-Doping Agency and stripped of his seven Tour de France titles. He also received a lifetime ban from competitive cycling. Armstrong was given a Feb. 6 deadline to testify under oath or forfeit any possible chance of reducing his lifetime ban. 

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