FBI investigates suspected serial child molester

William James Vahey
This combination of photos provided by the Federal Bureau of Investigation shows William James Vahey in 1995, left, and 1986. The FBI is asking for help to identify at least 90 victims of Vahey's, a suspected serial child predator who worked in American schools worldwide for four decades. Vahey, 64, killed himself in Luverne, Minn., on March 21.