WASHINGTON (CNN)  -- Roger Clemens said Wednesday he received only vitamin shots from Brian McNamee, but the ex-trainer insisted before a House panel that every injection contained steroids or other performance enhancers. Clemens sat mere feet from his chief accuser as the two men, both under oath, offered lawmakers starkly conflicting accounts about the injections McNamee administered years ago. The committee's chairman, Rep. Henry Waxman, said, "Someone isn't telling the truth." "If Mr. McNamee is lying, then he has acted inexcusably and he has made Mr. Clemens an innocent victim," Waxman said . "If Mr. Clemens isn't telling the truth, then he has acted shamefully and he has smeared Mr. McNamee. I don't think there is anything in between."
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Congressman blasts ex-trainer Brian McNamee for telling "lie after lie after lie"
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Disputing Clemens' account, ex-trainer says, "I have never given Roger B-12"
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McNamee further says that drugs "were part of the culture in baseball"
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McNamee says he injected Clemens "at his direction"; Clemens denies claim
McNamee's attorneys last week, however, showed reporters photos of needles and gauze that @placeholder said were used to inject Clemens with steroids and human growth hormone.