Diplomatic Immunity

President Sarejo, the ruler of a small South American country, has come to America for some urgent hospital treatment. He brings with him most of his cabinet so that he can keep an eye on them while away. What with them and the large number of his countrymen protesting outside the hospital there are an awful lot of people who may want him dead. It isn't him who dies though; first one of his cabinet and then another die of suspected heart attacks.