A Canadian pedophile suspect has pleaded not guilty to four charges of molestation and distribution of pornographic pictures of two Thai boys.  Christopher Neil was caught after police computer experts unravelled his digitally scrambled face from images found on the internet.  If found guilty the 32-year-old former teacher could spend up to 20 years in jail.  The pictures are thought to have been taken in Vietnam and Cambodia, and thus fall outside Thai jurisdiction.  However, after he fled to Thailand from South Korea, where he had been teaching English, two Thai brothers came forward and accused him of paying for sex when they were nine and 14 years old.