miscreant

noun
  1. 1

    One who has behaved badly, or illegally.

    โ€œThe teacher sent the miscreants to see the school principal.โ€

  2. 2

    One not restrained by moral principles; an unscrupulous villain.

  3. 3

    One who holds a false religious belief; a misbeliever.

adjective
  1. 1

    Lacking in conscience or moral principles; unscrupulous.

  2. 2

    Holding an incorrect religious belief.

Source: https://en.wiktionary.org/wiki/miscreant