Quote Originally Posted by lxdude View Post
Yes, you're right. The word arrest can be applied to detainment, that is, a person can be arrested and detained.
But there's a distinction between that and the more commonly used and understood meaning of the word, and even more so with the term "under arrest", which was used in the post to which I replied.
Legally, arrest means exactly what I outlined earlier. Custody is the action a police officer actually performs when he takes a person to the police station and books them, ie, "the officer took the suspect into custody" - which means the officer has now taken responsibility for the person and their possessions and is required to keep an accounting of all such matters to satisfy the court.

Unfortunately, for the average person, arrest is confused with custody due to too many cop shows. :-)