There are a couple of other sources and stories about this out there on the web which indicate that number comes from the FBI. One states that “various FBI reports” indicate that 100,000 to 300,000 childrenare actually trafficked in the U.S. each year.
I am trying right now to track down any FBI studies/reports on this issue.
Don't bother. It's made up. These "charities" do this every year when they need money.
Three hundred thousand a year equates to 821 children a day. If that were the case where are the stories?