Vigilante
01
治安维护者, 义务警员
an individual or group of individuals who take the law into their own hands, acting outside the legal system to enforce their version of justice or address perceived wrongs
例子
The town was divided over the actions of a vigilante who took it upon himself to apprehend suspected thieves.
这个小镇对一名治安维持者的行为意见分歧，他自行负责逮捕疑似小偷。
