Questão jurídica principal
Whether the federal appeal against the 5 May 2010 cantonal decision was still live after the 25 May 2010 prefectural prolongation order.
Decisão extraída
The appeal had become moot because, from 31 May 2010 onward, the appellant was detained under the later prefectural decision, not under the challenged cantonal judgment.
Fundamentação extraída
The later decision of the Biel Prefect replaced the earlier legal basis for the detention; the appellant can challenge that later prolongation before the cantonal court and, if necessary, the Federal Supreme Court.