Which action is considered a crime scene 'don't'?

Failing to document contamination at a crime scene is considered a significant error because proper documentation is vital for preserving the integrity of the investigation. When evidence is collected, any potential contamination — whether from environmental factors, personnel, or other sources — must be recorded meticulously. This documentation provides context for the evidence and can influence the reliability of the findings in court. Without this critical information, there may be challenges to the validity of the evidence, which could impact the outcome of legal proceedings.

By contrast, documenting contamination thoroughly ensures that all aspects of the scene are captured, maintaining transparency and supporting the integrity of the investigation. Taking photos at 90-degree angles and incorporating scales allows for accurate representation and measurement of evidence, while limiting access to the scene is essential for protecting the evidence from external interference, thus preserving the scene's integrity. Each of these actions is a 'do' in crime scene management, reinforcing the importance of meticulousness in crime scene investigation.