The Criminal Investigation Division (CID) is a specialized branch within law enforcement agencies, primarily focused on investigating serious crimes. This division typically handles cases involving homicide, robbery, fraud, and other major offenses. CID agents, often called detectives, gather evidence, interview witnesses, and work to solve crimes by piecing together information. CID plays a crucial role in the criminal justice system by ensuring that investigations are thorough and that offenders are brought to justice. They collaborate with other units, such as forensic teams and patrol officers, to build strong cases that can lead to successful prosecutions in court.