Question juridique clé
Whether the retrospective antenna search surveillance request against unknown fraud offenders was proportionate and lawful.
Solution extraite
The surveillance request was not disproportionate in principle, but the coercive-measures judge's refusal did not violate federal law and remained upheld.
Motifs extraits
The measure is an exceptional, subsidiary last resort for unknown offenders; compared with the cited precedent, the case involved no armed violence and no objectively very large criminal proceeds, so the refusal was justified.