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Webster 1913 Edition

Noun.

A wrongdoer.

Spenser.

Noun.

One who does wrong; one who commits a fault or crime.

misdoer ‎(plural misdoers)

person who commits a misdeed, offender
- 1843: Thomas Carlyle, Past and Present, book 2, ch. XIV, Henry of Essex
  Saint Edmund from the horizon’s edge, in shining armour, threatening the misdoer in his hour of extreme need: it is beautiful, it is great and true. So old, yet so modern, actual […]

Webster's Seventh New Collegiate Dictionary, Springfield, Massachusetts, G.&C. Merriam Co., 1967