Shaniah Boyd is among the Black and Latina girls missing in Washington, D.C., police say.
It's been seven years since Bengie Lynn Tyson was last seen in Billings, Montana driving a blue 1999 Chevrolet Silverado truck that is also still missing.
Aaliyah Hall Bell vanished in South Carolina while walking two blocks to visit her godmother.
Shields was last seen at LaGuardia Airport, where she had just finished speaking to her supervisor.
