Mayor Onno Hoes is singing the Maastricht Anthem with his friends from the Templar Society, aka de Tempeleers. Onno is their Patron. 

Two of these Templars, Frans Buytendijk (behind the Mayor's right shoulder) and Peter Reijnders (last frame, far right) are Detective and Police Commissioner respectively and they are directly connected to police file 2006145758, which became the blueprint of the copy and paste methods at the Bisschopsingel Bureau. With the purpose of putting citizens down.