Rockne Harmon was an Alameda County Deputy District Attorney who appeared for the prosecution in proceedings concerning DNA evidence, including admissibility, EDTA testing, and continued RFLP testing. He conducted direct examinations of California Department of Justice analyst Gary Sims and LAPD criminalist Collin Yamauchi, addressing DNA-testing procedures, evidence handling, and reported results. Harmon also cross-examined defense statistics expert Dr. Terence Speed, challenging his qualifications and his account of the statistical evidence before the jury.