**Perpetrator** (noun) — a person who carries out a harmful, illegal, or immoral action.
Here are some examples of using the word «perpetrator» in English:
1. The police arrested the perpetrator who stole the jewellery from the jewelry store.
2. The court found the perpetrator guilty of fraud and sentenced him to five years in prison.
3. The victim identified the perpetrator as one of her colleagues at work.
4. The organization works to prevent violence and protect victims from perpetrators.
5. The psychologist interviewed the victim and the perpetrator to understand the reasons for the crime.
6. The community gathered to support the victim and condemn the perpetrator's actions.
7. The prosecutor presented evidence against the perpetrator at the trial.
8. The victim support program helps victims of crime and provides assistance to them in dealing with the perpetrator.
9. The perpetrator of the cyberbullying was expelled from the school for his actions.
10. The investigation revealed that the perpetrator had a history of violent behavior.