We need an EU Attorney General and a EBI rather than the Europol

The title of this post is fairly self-explanatory. By "EBI" I mean a European Bureau of Investigation, à la FBI. The EBI should investigate and the EU Attorney should investigate. He should be appointed by the European Commission upon confirmation by the Council and the European Parliament. Why? Well there are a lot of arguments in terms of more efficient cross border policing, particularly relevant for the struggle against organised crime. However my concern is obviously closer to my comfort zone. This institution also makes sense from the point of view of a more coordinated fiscal policy.