As the US has been inundated with a record number of illegal immigrants, the number of children crossing illegally and then disappearing has also spiked.

A recent government report revealed that 32,000 children over five years have been lost in the system and cannot be tracked.

A federal whistleblower tells what happened when she tried to alert her superiors to signs that the US government was putting illegal immigrant kids into the hands of child traffickers and others who could be exploiting them.