Key legal question
Whether the evidence derived from the unapproved telephone surveillance of A.________ was unusable against the defendant.
Extracted holding
The surveillance result concerning the defendant was an unapproved personal chance finding, so the primary wiretap material could not be used; however, not all later evidence was excluded.
Extracted reasoning
Art. 9 BÜPF makes unapproved chance-finding information unusable. The court rejected blanket exclusion of all derivative evidence and held that later evidence remained usable if it would, with near certainty, have been obtained independently.