Steve, this is very simple.
ALL of the Agent's clients, are essentially, not the Agent's... they are the Broker's clients.
As the Broker, I would immediately notify the police that the Agent took the files; this is THEFT. I would also notify the state's Real Estate Division. Also, follow state/local regulations for terminating an Agent from the Office, and Associate of REALTORS (if applicable).
Note: If the Broker AGREES and the Client AGREES, the Broker can terminate the relationship with the clients, and transfer the file to the new Agent's Broker, OR, the Broker and the new Broker can agree with the clients acknowledgement, that a certain percentage or flat rate be paid to the new Broker (to pay the agent). HOWEVER, if the license is not even active, FORGET ABOUT IT.
Mark D Fleysher, MBA, Broker, REALTOR
The Jack Conley Realty Group
C. 702-291-8186 F. 702-946-0843