FBI agents from Houston are spearheading an international probe to determine how many students at elite private schools in nine countries fell victim to a teacher who authorities contend was a serial predator for more than four decades. The local agents went public with their investigation Tuesday, saying they may never know how many victims William James Vahey exploited during a global career that began in 1972 after he stopped registering for a molestation conviction in California. A thumb drive holds photos that show he had at least 90 victims since 2008 alone, according to the Houston FBI agents who are leading the ongoing global probe to find his victims as well as determine the extent of his crime. READ MORE HERE

Timeline of where accused child predator taught abroad