Beyond ‘Pillars’ and ‘Passerelle’ Debates: The European Union’s Emerging Crime Prevention Space - Legal Issues of Economic Integration View Beyond ‘Pillars’ and ‘Passerelle’ Debates: The European Union’s Emerging Crime Prevention Space by - Legal Issues of Economic Integration Beyond ‘Pillars’ and ‘Passerelle’ Debates: The European Union’s Emerging Crime Prevention Space 24 1 Legal Issues of Economic Integration