I started to ask myself.My immediate thoughts that everyone is exposed in the danger of being arrested wrongful or rightfully.The courts work with admissable evidence.If the evidence got cracks and not satisfactory then an investigation will lead to certain conclusion where the sentence will be delivered which is called verdict.
Actually, the Justice Department mandate is to protect the integrity of the State, Physical Assets,Livelihood which includes Humanity,Animals.
Each Country has its own system of Justice.Thats why the Criminals make a crime and jump to another State.Such a move is carefully calculated where the Criminal chooses a State which don't have any Memorandum of Understanding or where there are long tiresome legally implications