Answer:

vigilante

AnswerCrossword Clue
VIGILANTEOater stock character
VIGILANTEMember of a frontier group to enforce law and order.
VIGILANTEPhenomenon of frontier days.
VIGILANTESpanish for "watchman"
VIGILANTEOne who shortens the legal process?
VIGILANTEOne taking the law into one's own hands
VIGILANTEOne who doesn't wait for the police
VIGILANTESelf-appointed lawman