Crime scene investigators, often called CSIs, are specialized professionals who gather and analyze evidence from crime scenes. They play a crucial role in solving crimes by collecting items like fingerprints, blood samples, and weapons. Their work helps law enforcement understand what happened during a crime and identify potential suspects. Once evidence is collected, CSIs document everything meticulously and may use tools like cameras and forensic kits to preserve the scene. They often collaborate with other experts, such as forensic scientists and law enforcement officers, to piece together the puzzle of a crime, ensuring justice is served.