Comment The legal loophole that makes this happen (Score 2) 100
The norwegian police was asked by the italian police to retrieve this data. The norwegian police is eager to comply with requests from foreign police, as they themselves may need that kind of help abroad later. The loophole is that apparently no norwegian court is involved in the decision and norwegian laws are not consulted.
The bottom line is that you are not protected by your own country's laws when it comes to confiscating data. It's enough that someone in one of a hundred countries can get a police officer to send a request. Charges that would never hold in your own country is no barrier. Low corruption in your own country is no barrier. Bribe an italian police officer, hire an american lawyer and you can get at anything on servers in the western world.