Miscreant
/ˈmɪskriənt/
Definition 1 of 2
Pro Tip 1/3Legality Aspect
Refers to actions against the law, not just socially frowned upon or unethical behavior. 
He was deemed a miscreant after the bank robbery.
Pro Tip 2/3Severity of Actions
Usually implies a serious offense, not a minor wrongdoing or mistake. 
The community was outraged by the miscreant's violent actions.
Pro Tip 3/3Negative Connotations
Carries a strong disapproval, used to express moral judgment against someone. 
The judge scorned the miscreant for showing no remorse.