Nightclub bodyguard kills guest with one punch

Footage from last year (September 2014) emerged showing nightclub bodyguards punching guests. One of the guests lost consciousness, never got it back and died a few days after in hospital. The other bodyguard said during the trial that the guests were aggressive, but as you can see on the footage this wasn't the case. For me it's pretty clear the guy wanted to punch somebody and just did it. It happened in a nightclub called Passion in Wroclaw, Poland. The former name of the club was "Cocomo" and this nightclub network is known for extorting money from clients.