I den här uppsatsen har en konflikt mellan grundläggande EU-rättsliga värden utforskats genom en studie av den europeiska utredningsordern. Konflikten består i användandet av principerna om ömsesidigt förtroende och erkännande på straffrättens område, samtidigt som dessa principer ibland kolliderar med respekten för mänskliga rättigheter så som de definieras inom unionen. För att ge principerna om ömsesidigt förtroende och erkännande fullt genomslag skulle ett beslut om att begära en viss utredningsåtgärd från en annan stat behöva erkännas och verkställas utan någon extra prövning i den verkställande staten. För att ge mänskliga rättigheter fullt genomslag skulle å andra sidan den verkställande staten behöva göra en sådan prövning. Den här konflikten har tidigare utforskats i samband med den europeiska arresteringsordern, medan utredningsordern inte har fått samma uppmärksamhet. Det har kunnat konstateras att det finns många likheter mellan den europeiska arresteringsordern och utredningsordern, men att den senare också står inför helt egna utmaningar. Det finns nämligen stora skillnader mellan ett verkställande av ett överlämnade av en person till en annan stat, och ett verkställande av en utredningsåtgärd, så som till exempel en husrannsakan. Detta gör att den praxis som finns avseende den europeiska arresteringsordern måste behandlas med försiktighet. / In this essay a conflict between fundamental values of the European Union law has been explored through a study of the European Investigation Order. The conflict consists of the use of the principles of mutual trust and recognition within the area of criminal law, when these principles might collide with the respect for human rights as they are defined within the Union. I order to give full weight to the principles of mutual trust and recognition it would be necessary for the executing state to recognize and execute a decision of an investigative measure emanating from the issuing state without any further substantial assessment. For human rights to be adequately protected, it might however be necessary for the executing state to make that very assessment before executing the investigative measure in question. This conflict has already been explored in connection with the European Arrest Warrant, but the European Investigation Order has not yet received the same attention. There are many similarities indeed between the two, but the European Investigation Order also has completely unique challenges. One must keep in mind that there are great differences between an extradition decision and an execution of an investigative measure, as for example a search. This makes it essential to treat the Investigation Order as its own, viewing the case law regarding the Arrest Warrant with some precaution.

The criminal justice as well as the persons participating in criminal proceedings, they both are currently facing number of newly posed challenges and unanswered questions so far, due to the onward going integration of the European Union and much closer cooperation of the Member States, in the field of the Procedural Criminal Law. There have been established many new institutions within the field of the European Union in last few years and there were adopted many legal tools which directly influence the cooperation between the judicial and police authorities of individual countries. In connection with newly emerging forms of the crime and more coherent cooperation of the perpetrators of severe crime, the relevant authorities at the union level as well as at the national level encounter situations not being resolved at all, or which are specified by theoretical standards only and have not been put into practice yet. Due to the diversity and abundance of the legal tools and institutions which interfere the criminal law sphere without adjusting their mutual cooperation or without having sorted out the priority of application in many cases, the author of this thesis considers as an appropriate to have such comprehensive view to this relevant issue introduced to the specialized public, as well as having...