"C.I.D." stands for "Crime Investigation Department," which is a specialized unit within the police force in various countries, including India. Its primary role is to investigate serious crimes such as murder, robbery, and fraud. The department employs skilled detectives who gather evidence, interview witnesses, and work to solve cases that require more in-depth investigation than regular police work. The C.I.D. is known for its use of forensic science and advanced investigative techniques. Officers in this department often collaborate with other agencies and utilize technology to enhance their investigations. The work of the C.I.D. is crucial in ensuring justice and maintaining public safety.