Lance Armstrong's '60 Minutes' Confrontation: Surveillance Tape Requested by FBI

Lance Armstrong, Tyler Hamilton - SPLIT
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Authorities have requested a tape from the restaurant where Tyler Hamilton says his former cycling teammate made "aggressive contact" over the weekend.

The FBI is now getting involved in the alleged confrontation between Lance Armstrong and former cycling teammate Tyler Hamilton at an Aspen, Colo., restaurant Saturday night.

According to the New York Times, the FBI has requested surveillance video from the French restaurant Cache Cache. Co-owner Jodi Larner said she had spoken to an FBI agent on Tuesday morning who told her she would be subpoenaed for the tape.

Authorities are investigating whether Saturday night's incident can be deemed witness tampering, a source told the Times.

In a 60 Minutes interview last month, Hamilton accused Armstrong of using performance-enhancing drugs to win the Tour de France seven times. (Armstrong has been under federal investigation for a year for crimes related to doping and cycling.)

On Saturday night, according to Hamilton, Armstrong put his arm on his chest and asked him sarcastically how he was before launching into an expletive-filled tirade that contained threats, which Armstrong and an onlooker deny.

RELATED: Lance Armstrong, CBS News Engage in War of Words Over '60 Minutes' Expose

Hamilton's lawyers formally notified federal authorities Monday that Armstrong made "aggressive contact" against Hamilton. Attorney Chris Manderson says Armstrong repeatedly asked Hamilton how much he'd been paid to appear on 60 Minutes last month, and said his legal team would "[expletive] destroy you," "tear you apart on the witness stand" and "make your life a living [expletive] hell."

But Larner, a friend of Armstrong's denied the account.

"Lance never left the barstool," Larner added. "It was like two dudes meeting serendipitously. It was not a big confrontation." She called Hamilton's version "fictitious."

RELATED: Lance Armstrong's Attorney Slams CBS' 'Unpardonable Zeal to Smear' Tour de France Champ

Armstrong's lawyer, Mark Fabiani, declined comment. Armstrong told Outside Magazine writer Abe Streep that it was "certainly awkward for both of us" but "truly uneventful."

As for the surveillance tape, Larner told the Times that it would include only video from the kitchen -- the alleged incident took place in the bar -- so she's doubtful it would be of any use to the FBI.

 Armstrong has continued to deny using performance-enhancing drugs, and demanded an apology from 60 Minutes. The net's news chief, Jeff Fager, says they stand by their story.