quickly took on the tone of a trial.
There were exhibits, affidavits, medical records. The search for truth buried in a sea of conflicting information.
The best physical evidence against Roger Clemens, the "smoking guns" may be these bloody gauze pads, vials and syringes his former personal trainer Brian McNamee said he used to inject the Yankees pitcher with steroids and human growth hormone in 2000 and 2001, CBS News chief investigative correspondent Armen Keteyian reports.
A former police officer, McNamee told the committee he kept the material in waste-disposal box at home for years - for one reason: "While I liked and admired Roger Clemens, I don't think I ever really trusted him."
Federal authorities have reportedly sent the evidence to a lab for testing, setting up a potential forensic duel.
A specialist in DNA analysis, Lawrence Kobilinsky of John Jay College, says matching Clemens' DNA - if he agrees to provide a sample - to dried blood and trace amounts of anabolic steroids and HGH, is possible, even after eight years.
"The most important thing is we're dealing with DNA, we're dealing with protein, steroids," Kobilinsky said. "I don't think doing the analysis is an issue - there will be results. But how you interpret those results becomes crucial in this case."
Clemens' attorneys, including Rusty Hardin, have already made this pitch - accusing McNamee of manufacturing evidence.
Legal experts say defense lawyers could have a field day with evidence that sat around someone's home.
"We don't know where it went to between the time it was used and the time that it was placed into the custody of federal law enforcement officials," said CBS News legal analyst Andrew Cohen. "...Just don't know those answers yet."
So odds are the evidence will be inadmissible in court because there's no telling who handled it. That means we're talking about the court of public opinion here, and not the court of law.
Read More About Congressional Hearing Face Off
Read more from Cohen on Couric & Co. blog.
Watch RAW video of the Clemens hearing.