Similar situation in ORD Admiral's Club a couple of years back. Lawyer was discussing in detail how his client was being held by Chicago Police as a John Doe and that he had outstanding warrants so if they found out his real name they would throw away the key.

Almost but not quite enough information to be able to advise Chicago PD. If had named the police station where his client was being held, no expectation of privacy at that volume, I would have made the call.

Too big a city to call in and say "somewhere at some police station in the city you have a John Doe who has warrants."