It seems as if the TSA agent may have been in on it. He pulled the laptop off the belt and then handed it to a random woman who 'happened' to be with somebody causing a distraction. She did not protest the gift of the laptop. I find it hard to believe the agent 'happened' to hand it to just the right person.
I surprised there hasn't been more suggestion of this. There's are known classic scams for stealing laptops from security lines - the one I saw demonstrated used two people and a common type of laptop case. The entire context here is suspicious - I would be willing to bet at least pennies that the laptop will never turn up.
Seems a little unlikely that criminals are organising to buy plane tickets or obtain security clearances to steal things on security camera in a place crowded with security personnel when they could steal MacBooks just as easily by, say, wandering into a shared workspace.
They would make an exchange in a place where there are no cameras.
The person who took it would have a story ready in case she was challenged.
As for the TSA - they want to pretend that the incident never happened, because it would make them them look bad.