Lynch Law
From BiblePortal Wikipedia
Webster's Dictionary [1]
The act or practice by private persons of inflicting punishment for crimes or offenses, without due process of law.
The Nuttall Encyclopedia [2]
The name given in America to the trial and punishment of offenders without form of law, or by mob law; derived from the name of a man Lynch, dubbed Judge, who being referred to used to administer justice in the far West in this informal way.