(Christopher Redman, seasons 7–10): British trace analyst. He has a background knowledge about horse racing which was helpful for a case (7.13, And They're Offed). He always seemed to be nosy about what was going on about a case, but showed he cares about the team. Laboratory Technician Nikki Vega (Alexandra Adi, season 9): A lab technician who moved to Miami from another crime lab (it was never mentioned from where). Only appears in two episodes. Medical Examiner Tom Loman (Christian Clemenson, seasons 8–10): His work genuinely seems to excite him despite its macabre nature, even performing an autopsy on the fly for some medical students on a cadaver donated to science, which was eventually discovered to be a victim of a crime the CSIs were investigating. He occasionally laments at how violent people can be to each other, as a contrast to his usually upbeat demeanor, but it only strengthens his resolve to discover what killed those that entered his morgue. He often becomes frustrated or upset when anyone, including the CSIs, interrupts him whenever he runs with a theory or conducts an examination, or makes them wait until his theory is confirmed or if the evidence denies it, even going as far as to prevent them from collecting evidence off of the body until he conducts his examination in the autopsy room. Miami-Dade Police Department MDPD Robbery-Homicide Division (RHD) Detective John Hagen (Holt McCallany, seasons 1–3): A homicide detective who had emotional and psychological problems. He was also Raymond Caine's partner prior to his faked death. He told Calleigh once that he could not stand being reminded of being the partner of a dirty cop. He also had a brief relationship with Calleigh in season 2. While pulling a crucial piece of evidence from a crime scene, he panicked when Calleigh came over to photograph the scene; he then crept up behind her and put his gun behind her head. Although he did not mean to hurt her, it allowed him time to escape (she did not know it was him at that time). He later shot himself in the Ballistics Lab right after Calleigh turned around to walk out of the lab during the season 3 finale. MDPD Robbery-Homicide Division (RHD) Detective Adelle Sevilla (Wanda de Jesus, season 1): A Latina homicide detective who occasionally accompanies the CSIs. She appeared in ten episodes of season 1 and