Good thing you aren't a lawyer. Dr. Dao certainly had a license to be where he was.
It didn’t matter. That was not the place to adjudicate a dispute. When the police are called to a scene and there is no question about who owns the property, they are going to remove an offending person from the premises. Everybody except this Dao guy apparently knows this, because this sort of thing happens thousands of times every year and nobody else had to get dragged away by the police.
“Dr. Dao certainly had a license to be where he was. “
No, he didn’t. His boarding pass was revoked.
Explain this ‘license’ you speak of that didn’t exist.