Officer Robert Riske's extended testimony dominated Day 16. On direct, he described responding to 875 South Bundy, discovering the victims, securing the scene, and showing supervisors and detectives the blood, shoeprints, glove, cap, envelope, and other evidence. On cross, Cochran questioned Riske about his ungloved use of the residence phone, items he did not see photographed or fingerprinted, discrepancies in the crime-scene log and report, the timing of rear-gate photographs, officers' lack of protective gear, and photographs in which the glove and envelope appeared to have moved. The questioning advanced the defense's challenge to crime-scene integrity, while Judge Ito limited use of video and still images where foundation or prejudice concerns arose.

• Officer Riske testified to discovering the victims and initial crime scene observations, including blood, shoeprints, glove, cap, and envelope.
• Cochran elicited that Riske used Nicole Simpson's phone without gloves and agreed an outgoing call would have disturbed a dialing component if the phone had one.
• Crime scene photographs showed the glove and envelope in different positions relative to tile grouting, which Riske could not explain.
• In chambers, Cochran argued that a videotape showing multiple people at Bundy demonstrated mishandling and overcrowding; Clark disputed its context, and Ito excluded the full tape while allowing questioning about one still photograph.
• Crime scene log discrepancy revealed: recorded arrival 12:20 versus Riske's actual arrival 12:13.
• Rear gate blood photographs were taken after Riske left at 7:15 AM, undercutting assumptions about when evidence was documented.
• Cochran alleged that Pablo Fenjves watched television in violation of the court's order; Darden disputed that it was a current violation and apologized to Shapiro over Clark's leak accusation.