Question juridique clé
Whether the complainant was entitled to appeal the cantonal non-prosecution decision on the merits
Solution extraite
He lacked standing as a mere injured person and could only raise procedural complaints amounting to a denial of justice.
Motifs extraits
Because he was neither a private prosecutor nor an 'injured person' with standing under the Federal Supreme Court Act, substantive review of probable cause was unavailable; his attack on the assessment of suspicion was a merits complaint.