Easiest to do in Mission 16: 'Operation Endgame'. Brunhilde will 'offer' to send 10 criminals onto your island after you've exported 1000 goods, right after the start of the mission. Decline for now and finish the next task to get 10 policemen. Build 2 prisons. Later, she will drop the 10 criminals on the beach of the island. In the almanac under Lists -> Residents - Job you will find the criminals. Simply press A on one and select to arrest him. Note that it'll take time for the police to catch them.