Which is not a duty a police officer can perform at a crime scene?

The action of taking control of all surrounding businesses does not fall within the typical duties of a police officer at a crime scene. While officers are responsible for securing the scene, ensuring safety, and preventing contamination of evidence, their authority does not extend to assuming control over private businesses in the vicinity. Instead, police officers generally cordon off an area or establish a perimeter around the crime scene to preserve evidence and maintain public safety.

In contrast, removing obstructions is essential to ensure that emergency services can access the area and that the scene is safe for investigation. Photographing the scene is a critical responsibility that allows for a visual record of the evidence and conditions present at the time of the crime. Conducting necessary investigations involves gathering evidence, interviewing witnesses, and identifying potential suspects, which are fundamental aspects of the officer's duties. Thus, the correct answer highlights a misunderstanding of the scope of police authority at crime scenes.