McNamee gives DNA evidence against Clemens

Brian McNamee submitted DNA evidence to federal investigators trying to determine whether Roger Clemens committed perjury when he testified in front of Congress.

It is unclear whether federal authorities have a sample of DNA from Clemens, according to the Times. Clemens' lawyer, Rusty Hardin, would not divulge that information.

"As I have said from the beginning, we are willing to cooperate with any aspect of the government's investigation," Hardin told the Times.

Somehow, I have the feeling that the burden of proof may be too much to actually nail Clemens on perjury. McNamee held the DNA evidence for a long time, and there's quite the possibility that Clemens' lawyers would play the tampering card in defense.