Note from the article:
> The boy’s father said he booked the ticket using Skiplagged, which helps find such throwaway options, but he didn’t know that airlines frowned on this. The dad always books with Skiplagged, and has for years, but the child had never even traveled alone before. The boy was on his own and confessed.
The family (and account used to purchase the tickets) was likely red flagged. This is harder to catch if you don't check in with a person (using a kiosk or app), but it is easy to imagine that there's a note on the account in the checkin screen for the employee to see... which an unaccompanied minor would need to use.
If any luggage was asked to only be checked through Charlotte, then that raises additional red flags.
The airline likely needs to do some due diligence. The individual is an unaccompanied minor flying. Imagine what they airline would need to do if he didn't get on the connecting flight to New York.
That said - it would likely have been caught in Charlotte as the unaccompanied minor is escorted to the next flight and ended up much the same way.
https://www.aa.com/i18n/travel-info/special-assistance/unacc...
• Unaccompanied minor service optional, service fee still applies
• Gate escort and guardian contact required