As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING FLIGHT THE LAVATORY DOOR WAS STUCK CLOSED WITH A PASSENGER INSIDE THE LAVATORY. THE CREW DIVERTED TO KSDF AND LANDED WITHOUT INCIDENT. MAINTENANCE FREED THE PASSENGER. FOUND THE LOWER LOCKING ROD ON THE LAVATORY DOOR TO BE DETACHED. THE LOWER LOCKING ROD ON THE LAVATORY DOOR WAS RE-ATTACHED, OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.