Questão jurídica principal
Whether the testimony of previously convicted co-defendants was null and unusable as evidence.
Decisão extraída
After final conviction, a former co-defendant may be heard as a witness; even if a contrary reading of cantonal procedure were possible, any defect would not be an obvious, jurisdictional nullity.
Fundamentação extraída
The protection of an accused's procedural rights no longer applies in the same way after final conviction. At most, the point could raise ordinary procedural error, not a manifest and serious defect leading to nullity.