Clemens gets boost from scientist's testimony - KWWL - Eastern Iowa Breaking News, Weather, Closings

Clemens gets boost from scientist's testimony

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WASHINGTON, D.C. (KWWL) -

Roger Clemens' defense may have regained the momentum in his perjury trial. A scientist has testified Tuesday that the government's physical evidence against the former pitcher could have been contaminated.

Forensic toxicologist Bruce Goldberger, a witness for the defense, said that the evidence against Clemens is lacking because of the potential for contamination.

Government witnesses have testified that some of the physical evidence had both steroids and Clemens' DNA. Goldberger didn't challenge that but said the government's conclusions that Clemens had used steroids were overreaching.

Clemens is charged with lying to Congress in 2008 when he denied taking steroids or human growth hormone.

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