Questione giuridica chiave
Whether the federal criminal complaint against the detention measure became moot after the cantonal judgment was annulled.
Decisione estratta
The complaint had become moot because the challenged decision no longer existed.
Motivazione estratta
Once the Canton of Zurich Court of Cassation annulled the appealed judgment, the object of the federal proceedings disappeared; the case had to be struck from the docket under Art. 32(2) BGG.