A more thorough explanation:

Definition: A perp is a slang term for a perpetrator, which means a person who commits a crime or offense.

• The police arrested the perp for stealing a car.
• The perp was caught on camera robbing the convenience store.

These examples show how the term "perp" is used to refer to someone who has committed a crime. The police use this term when they are talking about a suspect they have arrested or are looking for. It is important to remember that using slang terms like "perp" is not appropriate in formal or professional settings.