29/06/2016 - - General
Ne bis in idem: Fresh proceedings may be brought against a suspect in a Schengen State where previous criminal proceedings in another Schengen State were terminated without a detailed investigation

An important judgment in preliminary ruling on the interpretation of the ne bis in idem principle in Schengen context has been pronounced today.

Thus, in its judgment on 29 June 2016 in Case C-486/14 'Piotr Kossowski' the Court of Justice of the European Union has ruled that a decision of the public prosecutor terminating criminal proceedings and finally  closing the investigation procedure against a person (without any penalties having been imposed) cannot be classified as a final decision for the purposes of the application of the ne bis in idem principle, when it is clear from the statement of reasons for that decision that the procedure was closed without a detailed investigation having been carried out. The fact that neither the victim nor a potential witness was interviewed is an indication that no detailed investigation was undertaken.

The Court observed that the aim of the ne bis in idem principle is to ensure that a person, once he has been found guilty and served his sentence, or, as the case may be, been acquitted by a final judgment in a Schengen State, may travel within the Schengen area without fear of being prosecuted in another Schengen State for the same acts. However, that principle is not intended to protect a suspect from having to submit to investigations that may be undertaken successively, in respect of the same acts, in several Schengen States.


The judgment is available here, in all EU official languages, exempting Gaelic. You may also find useful to read the press release issued by the Court. 



The public prosecutor’s office, Hamburg (Germany), accuses Mr Piotr Kossowski of having committed, in Hamburg, the offence of extortion with aggravating factors. However, the Landgericht Hamburg (Hamburg Regional Court) has refused to open trial proceedings on the ground that it is prevented from doing so by the ne bis in idem principle, as it applies in the Schengen area. By virtue of that principle, a person cannot be tried or punished twice in criminal proceedings for the same offence. In the present case, the public prosecutor’s office in Kołobrzeg (Poland), where Mr Kossowski had been arrested for another criminal offence, had already opened a criminal investigation procedure against him in respect of the same facts and had definitively closed it in the absence of sufficient evidence. The specific reasons for the decision of the Kołobrzeg public prosecutor to close the investigation were that Mr Kossowski had refused to give a statement and that the victim and a hearsay witness were living in Germany, so that it had not been possible to interview them during the investigation and had therefore not been possible to verify statements made by the victim. No other more detailed investigation had been carried out in Poland.

Hearing an appeal brought by the Hamburg public prosecutor, the Hanseatisches Oberlandesgericht Hamburg (Higher Regional Court, Hamburg) asks the Court of Justice for guidance on the scope of the ne bis in idem principle. In particular, it wishes to know whether, given that the decision of the Polish prosecutor was taken without a detailed investigation, Mr Kossowski must be regarded as a person whose case has been ‘finally disposed of’ or who has been ‘finally acquitted’, so that the ne bis in idem principle would preclude further prosecution for the same acts in Germany.

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