Convicted paedophile and American national William Vahey, 64, taught at a string of schools around the world, after avoiding the sex offenders register in California.
Vahey was convicted over a child sex offence in California in 1969 but appears to have failed to sign the sexual offenders' register, which allowed him to slip through the net and go on to work in several schools.
More top news
A British climber trapped on Mount Everest after the earthquake in Nepal has said rescuers face "a race against time" to reach his group
People who suffer from back pain may have closer links to their chimpanzee ancestors, according to researchers.
David Cameron will say the Tories are the party of the "grafters, roofers, retailers and plumbers" as he set out plans to help small firms