What is a citizens arrest, how does it work, etc?

Question

I'm just curious, but please be as specific and extensive as possible. Does it differ by state?

Answer 1

A citizen's arrest is an arrest performed by a person acting as a civilian, as opposed to a sworn law enforcement officer. In common law jurisdictions, the practice dates back to medieval England and the English common law, when sheriffs encouraged ordinary citizens to help apprehend law breakers.

Answer 2

1