A DNA expert in the perjury trial of Roger Clemens has testified that he has matched the genetic profile of Clemens to articles of medical waste kept by Brian McNamee who claims he injected Clemens with performance enhancing drugs.

“This genetic profile is compatible with Mr. Clemens,” Alan Keel, a DNA expert for Forensic Science Associates in California and a prosecution witness, said referring to DNA found on the needle.

Keel said he had found a small number of cells on a needle that also matched Clemens.