Kernrechtsfrage
Whether the defendant's role amounted to co-perpetration rather than aiding and abetting in the robbery
Extrahierter Entscheid
The defendant did not make an essential contribution and therefore was not a principal offender with co-dominion over the act.
Extrahierte Begründung
The lower court found the robbery would have been carried out without him, his role was marginal, he could only be used at the edges of the plan, and his flat was not indispensable. Those findings were not shown to be arbitrary.