The DNA conversation ensues as the defense wraps up the cross-examination of Robin Cotton, the DNA lab director. Marcia Clark's re-direct was an attempt to draw attention to the defense casting doubt on test results. Afterward, Gary Sims, a Criminalist with the California Dept. of Justice DNA Laboratory, takes the stand. He provides strong testimony about blood evidence recovered from O.J.'s Ford Bronco, the bloody glove, blood at the crime scene and blood under Nicole's fingernails.