Final answer:
The seven S's principle of scanning may have been violated in the OJ Simpson case due to improper evidence collection and site preservation, raising questions about the initial survey strategy used by investigators.
Step-by-step explanation:
During the crime scene investigation of the OJ Simpson case, the principle of scanning was one of the seven S's that was potentially violated. Scanning involves the initial survey of the crime scene where investigators develop a strategy for the systematic examination and documentation of the entire area. In the Simpson case, there were missteps in the preservation and collection of evidence, leading to questions about the thoroughness of the scanning process.
Critics argued that the crime scene was not properly secured, which allowed for the contamination of evidence and may have compromised fingerprints and DNA samples. Moreover, the suggestibility issue mentioned in the context of the DC sniper case highlights the broader challenges law enforcement faces with witness testimony and preserving the integrity of evidence. In both instances, proper procedures are critical to avoiding misinformation and ensuring that accurate memories and evidence are used in investigations and subsequent trials.