The criminal was detained by the police.

Detained : keep (someone) in official custody, typically for questioning about a crime or in a politically sensitive situation.
Protected : keep safe from harm or injury.
Dismissed : order or allow to leave; send away.
Released : allow or enable to escape from confinement; set free.
Deterred : discourage (someone) from doing something by instilling doubt or fear of the consequences.

Antonym of Detained is Released