I watched a documentation about police (EU) some months ago. They were called because supposedly there were "foreigners" causing trouble. They arrived and tried to figure out what the deal was but they were very confused. So the "troublemakers" were friendly and cooperative and the old man who called the police wanted the others gone. Police quickly realized who the actual problem was but the guy was having none of it. He even escalated and was even taken into custody if I recall correctly.

Not sure where the hell I was going with this story but your story reminded me of it. Something about suspicion I guess?