Liberty is a moral and political principle, or Right, that identifies the condition in which human beings are able to govern themselves, to behave according to their own free will, and take responsibility for their actions...
usually in relation to the purported investigation
A detective is an investigator, either a member of a police agency or a private person. The latter may be known as private investigators or "private eyes"...
and prevention of crime
Crime is the breach of rules or laws for which some governing authority can ultimately prescribe a conviction...
and presenting (the arrestee) into the criminal justice system or harm to oneself or others. The term is Anglo-Norman
Anglo-Norman is the name traditionally given to the kind of Old Norman used in England and to some extent elsewhere in the British Isles during the Anglo-Norman period....
in origin and is related to the French word arrêt, meaning "stop".
The word 'arrest' when used in its ordinary and natural sense, means the apprehension or restraint of a person, or the deprivation of a person's liberty.