Constitutional law - Fundamental rights and freedoms - Mutual legal assistance in criminal matters - Request of foreign state for taking of evidence from witnesses in Jamaica - Witnesses refusing to co-operate – Application of central authority for order for witnesses to give evidence on oath - Order granted – Whether order an abuse of process – Whether order breached constitutional rights of witnesses - Right to equitable and humane treatment – Right to be free from discrimination on political grounds - Right to fair hearing – Right to due process - The Mutual Assistance (Criminal Matters)