Brian Kelberg was a deputy district attorney who joined the prosecution team and took a substantial role in presenting and contesting forensic medical evidence. Across 29 distinct trial days, he conducted extensive direct examination of Chief Medical Examiner Dr. Lakshmanan Sathyavagiswaran and cross-examined defense medical experts Dr. Robert Huizenga and Dr. Michael Baden, using exercise videos and medical records in questioning Huizenga and challenging Baden’s time-of-death analysis and other forensic opinions. During an April 3 motion hearing, Kelberg acknowledged that Dr. Golden had made mistakes, argued that their medical significance should be tested through science and medicine rather than collateral character attacks, and explained that his view of expert cross-examination differed from that expressed in a motion filed by his colleague Mr. Harmon.