Questão jurídica principal
Whether intercepted telephone records from an investigation against Y. could be used against X. without prior approval under Art. 9 BÜPF
Decisão extraída
As to X., the intercepted calls were a personal incidental finding; further investigation required prior approval by the authorizing authority, so the records were not admissible against him.
Fundamentação extraída
The wiretap was ordered only against Y. and unknown persons. X. emerged later from the analysis of those lawful interceptions. Under Art. 9 BÜPF and the later case law, such a person is not covered by the original approval; further investigative steps without prior consent are unlawful, and the resulting evidence is unusable.