Kernrechtsfrage
Which canton had the statutory criminal venue for the allegations against X?
Extrahierter Entscheid
The statutory venue remained in Solothurn at the relevant earlier stage, but there were later triftige Gründe to depart from it and assign the case to Graubünden.
Extrahierte Begründung
For co-perpetration and participation, venue follows the main offender or the first-opening authority; on the request date Solothurn already had venue for the gravest charged conduct. Later, however, the center of gravity of the remaining investigations was clearly in Davos, and process-economy, evidence-taking, and the defendant's residence justified a venue transfer.