Which of the following is a common pitfall to avoid during a crime scene investigation?

Failing to secure the scene is a critical pitfall to avoid during a crime scene investigation because the integrity of the scene is paramount for the collection of evidence. Securing the scene ensures that no individuals can interfere with, alter, or contaminate crucial evidence that could be pivotal in a criminal case. An unsecured scene can lead to the loss of physical evidence, tampering, or even the introduction of extraneous items that could mislead investigators or contaminate the evidence present.

When a crime scene is compromised, it can severely impact the investigation's accuracy and reliability, leading to challenges in court and potentially jeopardizing the prosecution of the case. This is why it is essential for investigators to establish a secure perimeter, control access, and carefully monitor who enters and exits the scene to preserve its integrity.

The other options, like thorough documentation, using advanced forensic technology, and conducting multiple interviews, are essential practices in an investigation and do not pose the same level of risk to the investigation's credibility as failing to secure the scene.