Met policeman refusing to perform his duty

the only time any policeman, soldier, airman or sailor etc can refuse to do something is that the order to perform a task is illegal. It is illegal to arrest somebody in Iraq and hand the person either to be tortured or killed by the militia now operating in Iraq. Kendall-Smith had to serve time because he disobeyed orders. Ben Griffin was released from the army because he signed to defend Queen and Country not to kill on behalf of American foreign policy. This police man should have been dismissed from the police for refusing a legal legitimate order. He has failed in his duty to perform his duties without fear or favour.