A more thorough explanation:

Arretted (/əˈrɛtɪd/), adjective. (Of an accused) brought before a judge and charged with a crime.

• After being arretted for theft, the suspect was taken to court.
• The police arretted the suspect and charged him with assault.

These examples illustrate the definition of arretted by showing how someone who has been accused of a crime is brought before a judge to face charges. In both examples, the suspects were taken into custody and charged with a crime, which is the process of being arretted.