FILE - This combination of photos provided by the Federal Bureau of Investigation shows William James Vahey in 1986, 1995, 2004 and 2013. Vahey, 64, killed himself in Luverne, Minn. on March 21, 2014. The discovery of Vahey, a man the FBI regards as one of the most prolific pedophiles in memory has set off a crisis in the community of international schools, where parents are being told that their children may have been victims, and administrators are scurrying to close loopholes exposed by Vahey's abuses. (AP Photo/FBI, File)
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