Investigators are on the search for victims of a suspected serial child predator.
64-year-old William James Vahey taught in private American schools around the world.
Last month, he committed suicide after his employer in Nicaragua found pornographic pictures of boys on a thumb drive.
Vahey confessed that he was molested as a child and abused boys his entire life by giving them sleeping pills prior to molestation.
The FBI believe many victims may be unaware of what happened to them.
