There was a situation a few years ago where a black female congress woman coming back from Africa, was handcuffed, strip searched and held for a few days at ORD Immigration. She was unable to contact her family and they waited for her to evacuate her bowels.
Why? She met the profile of a drug courier. She was black, female and coming from Africa after a short stay.
She raised quite a ruckus. The story disappeared quite quickly never to be heard about again.