The CID, or Criminal Investigation Department, is a term for a specialized unit within law enforcement agencies that deals with investigating serious crimes. Synonyms for the CID include the Criminal Investigation Division, Crime Investigation Department, and the Investigative Division. Additionally, some countries may have their own specific names for this department, such as the National Bureau of Investigation in the Philippines or the Directorate of Criminal Investigation in Kenya. Regardless of what it is called, the CID plays a crucial role in ensuring that justice is served and criminals are brought to account for their crimes. Their work is often challenging and high-pressure, requiring a combination of skill, experience and tenacity.