At 17 months old, Callum graduated to his dad's electronic drum kit, bringing him so much joy. "He was so focused and not just banging randomly like most babies," Wes said. "He says 'high hat snare' ...

ROGER YOUNG: I joined the FBI in November 1975, and in October 1977 began working child pornography ... with the Postal Inspectors and other agencies, and through his efforts he developed research ...