Key legal question
Whether the appeal against the joinder of criminal investigations was admissible immediately before the Federal Tribunal
Extracted holding
The appeal was inadmissible insofar as it challenged the joinder of the investigations, because no irreparable prejudice was shown.
Extracted reasoning
Incident decisions on joinder in criminal proceedings do not ordinarily cause irreparable harm under Art. 93(1)(a) LTF; the appellant failed to demonstrate exceptional prejudice.