He was refered to a manager. And then he was given a boarding pass by who? The janitor?
Also their luggage wasn’t likely vetted by security but likely went straight to the plane in the last minutes befoe departure.
How else would a bomb be found in luggage at Detroit?
He may have been referred to a manager, but no one is saying they saw him speak to a manager. He was (according to this story) sent down the hall. Who knows if he went there? He supposedly had a US visa, so he could have just decided to use his passport & visa and skip the sob story.