There is an international private detective called L.
 As with other kinds of detectives, citizen detectives try to solve crimes in multiple ways such as searching a crime scene, interviewing and/or interrogating suspects and witnesses, doing surveillance on persons of interest, collecting evidence, acting as sources for local news, giving anonymous tips to the police and at times even making citizens arrests while a crime is being committed
In 1887, Arthur Conan Doyle created Sherlock Holmes, arguably the most famous of all fictional detectives

