Perp (noun)

A criminal or suspect, especially one who has been apprehended.

Origin:

Short for perpetrator, from the latin verb perpetrare, meaning "to accomplish, to carry out".

Examples:

1. The police are looking for the perp who robbed the convenience store.
2. The eyewitness identified the perp as the man who ran from the scene of the crime.
3. The perp was caught on camera.
4. The perp was apprehended and arrested.
5. The perp was taken into custody.