In a properly regulated industry the ATC controller should have had the powers to inform the IAA who should have immediately seized the CVR and FDR recordings.
One European authority have a mobile aviation police force that can do this.
Unfortunately many of us have participated in illegal acts, many of which are known by the authorities and are ignored.
I flew for 10+ years with a technically invalid license - this was known by the company/authority/union - answer keep your mouth shut.
A friend was chief training captain and had to provide a group of instructors for a foreign carrier. They flew illegally despite his protests until after an IFALPA meeting where he mentioned it to a fellow delegate. Within a week he had a valid license but lost his management job.
I have made three complaints to aviation authorities - only one -the FAA - acted appropriately.
It is about time that the aviation authorities policed the industry properly - and I am not talking about India or China.