Question juridique clé
Whether the appeal against the joinder of criminal investigations was admissible immediately before the Federal Tribunal
Solution extraite
The appeal was inadmissible insofar as it challenged the joinder of the investigations, because no irreparable prejudice was shown.
Motifs extraits
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.