Under the circumstances- these guys should be covered by the Geneva Convention- Chapter IV, Article 25 of the Geneva Convention states that "Members of the armed forces specially trained for employment, should the need arise, as hospital orderlies, nurses or auxiliary stretcher-bearers, in the search for or the collection, transport or treatment of the wounded and sick shall likewise be respected and protected if they are carrying out these duties at the time when they come into contact with the enemy or fall into his hands." Article 29 reads "Members of the personnel designated in Article 25 who have fallen into the hands of the enemy, shall be prisoners of war, but shall be employed on their medical duties insofar as the need arises." According to the Geneva Convention, knowingly firing at a medic wearing clear insignia is a war crime.