Vigilantism in the United States
Vigilantism in the United States of America is defined as acts which violate societal limits which are intended to defend and protect citizens from some form of attack or some form of harm.
In the United States, a citizen's arrest is a procedure rooted in common law and protected by the Constitution, allowing civilians to detain individuals they have witnessed or reasonably suspect of committing a crime.
The exact circumstances under which this type of arrest, also known as a detention, can be made varies widely from state to state.