Lance Armstrong Teammate Tyler Hamilton Alleges Banned Substances Use

The story of whether Lance Armstrong cheated by doping during his cycling days: it is not over. Tyler Hamilton, Armstrong's former teammate on the U.S. Postal Service team, told CBS News' Scott Pelley that he saw Armstrong using testosterone, EPO and other banned substances, multiple times and along with other teammates. CBS reports the feds are now investigating the charge.

Hamilton includes himself among those team members who he says cheated.

The allegation will air on 60 Minutes on May 22 during a story on a six-month investigation into cycling by CBS.

Hamilton also claims Armstrong did fail a drug test during his cycling career, though the claimed failure of one out of hundreds of drug tests is nowhere near as big a bombshell as a former teammate's eyewitness claims. Though, of course, they're just claims at this point. It's also definitely not the first time he's been accused of doping by a fellow cyclist.

For more on Lance Armstrong, as well as the cycling world at large, check in with SB Nation's blog, Podium Cafe.