Have the police checked to see if drugs were involved? Highly likely, as I have seen it, deals go on quiet often.
So a man pulls a knife on a foreigner having allegedly been acting like a Peeping Tom and is not charged. The police will take no action because no one filed a complaint but feed the fish and its Armageddon!
"Feed the fish and it's Armageddon"? Took me a few seconds but I got there in the end! Good one!