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)
An American national, center, reportedly working for the FBI, leaves a police station in Karachi, Pakistan, Thursday, May 8, 2014. Pakistan released an FBI agent on bail Thursday after three days in custody, officials said, a move that is likely to prevent the situation from escalating into a diplomatic spat. The American man was detained after airport authorities found him carrying ammunition and three knives Monday as he was about to board a flight for the Pakistani capital, Islamabad.(AP Photo/Mohammad Khalil)
FILE - This file photo by the Federal Bureau of Investigation shows Dzhokhar Tsarnaev, surviving suspect in the Boston Marathon bombings who is accused in two bombings that killed three people and injured more than 260 others near the finish line of the April 15 marathon. Lawyers for Boston Marathon bombing suspect Dzhokhar Tsarnaev argued Wednesday, May 7, 2014, that statements he made to authorities after he was arrested should be thrown out because he was questioned for 36 hours in a hospital room while suffering from gunshot wounds and without being told his rights. (AP Photo/Federal Bureau of Investigation, File)
FILE - Actor Efrem Zimbalist Jr, watches during a ceremony honoring him by the FBI at the Federal building in Los Angeles in this Monday, June 8, 2009 file photo. The 90-year-old, who starred in the TV show,`The FBI'' from 1965 to 1974, was honored for his historic contributions to the FBI. Zimbalist, the son of famous musicians who gained television stardom in the 1950s-60s hit "77 Sunset Strip" and later "The FBI," died Friday at his ranch in Solvang, Calif., at age 95. (AP Photo/Nick Ut, File)
FILE - During an actual training session at the FBI Academy, TV star Efrem Zimbalist, Jr., right, perfects his pistol firing technique under the watchful eyes of an unidentified FBI instructor, in this May 21, 1965 file photo taken in Quantico, Va. Zimbalist, the son of famous musicians who gained television stardom in the 1950s-60s hit "77 Sunset Strip" and later "The FBI," died Friday at his ranch in Solvang, Calif., at age 95. (AP Photo, File)
FILE - Veteran actor Efrem Zimbalist, Jr., known for his starring roles in “77 Sunset Strip” and “The FBI,” stands outside his home, in this Feb. 16, 1982 file photo taken in Los Angeles, Calif. Zimbalist, the son of famous musicians who gained television stardom in the 1950s-60s hit "77 Sunset Strip" and later "The FBI," died Friday at his ranch in Solvang, Calif., at age 95. (AP Photo/Wally Fong, File)