Man invades city hall and is killed by security

A man in search of his ex-girlfriend, who worked at the town hall, to be late, barged in. The armed guard went after him to tell him that he would have to leave and go away. The man begins to attack the guard, giving him punches, kicks, without any reason. The guard does not fight back, but at a certain moment he pulls a gun and fires a single shot that hits the head of the man who died moments later.