Criminalists are professionals who apply scientific methods to investigate crimes. They analyze physical evidence, such as fingerprints, blood samples, and fibers, to help solve cases. Their work is crucial in the criminal justice system, as it provides objective data that can link suspects to crime scenes or exonerate the innocent. These experts often work in laboratories or at crime scenes, collaborating with law enforcement agencies. They may specialize in various fields, including forensic biology, toxicology, or ballistics. Their findings can be presented in court, making them essential in ensuring justice is served.