HOW AN AMERICAN PROFESSOR PAID FOR A MURDER COVER-UP As far as murders go the death of Natsaporn Yongyingpoon could hardly have been more brutal. The 23-yr-old farm girl from North Eastern Thailand was beaten relentlessly for four hours before the murderess executed. The coup de grace was a wok full of boiling oil. Yet when Yongyingporn, nicknamed Sorn’ (far left) was …