Fictional detectives Dupin. Later, Sir Arthur Conan Doyle's Sherlock Holmes became the most famous example and remains so to this day. The detectives are often accompanied by a Dr. Watson-like assistant or narrator. However, in several of her novels where he appears, Agatha Christie gives reference to Hercule Poirot being the greatest detective in all the world. Fictional detectives generally fit one of four archetypes: Notable fictional detectives and their creators include: Fictional detectives Fictional detectives are characters in detective fiction. These characters have long been a staple of detective mystery crime fiction, particularly in detective novels and short stories. Much of
Special Detective Unit Special Detective Unit The Special Detective Unit (SDU) () is the main domestic security agency of the "Garda Síochána", the national police force of the Republic of Ireland, under the aegis of the Crime & Security Branch (CSB). It is the primary counter-terrorism and counter-espionage investigative unit within the state. The Special Detective Unit superseded the Special Branch (which they are still commonly referred to as), which itself replaced the older Criminal Investigation Department (CID), which was founded in 1921. They work in conjunction with the Defence Forces Directorate of Military Intelligence (G2) – the Republic of Ireland's national intelligence