Question juridique clé
Whether X. had standing to appeal the cantonal decision before the Federal Supreme Court.
Solution extraite
X. lacked standing because he was not a party to the cantonal proceedings, had not sought to become one, and had not been validly represented below.
Motifs extraits
Only persons who were parties before the lower authority, or were wrongly denied that possibility, may appeal. X. did not meet either condition, and the sister had not acted in his name; moreover, under the cantonal procedure, criminal parties could be represented only by a lawyer.