Case C-507/10: Judgment of the Court (Second Chamber) of 21 December 2011 (reference for a preliminary ruling from the Tribunale di Firenze — Italy) — Criminal proceedings against X (Police and judicial cooperation in criminal matters — Framework Decision 2001/220/JHA — Standing of victims in criminal proceedings — Protection of vulnerable persons — Hearing of minors as witnesses — Special measure for early taking of evidence — Refusal by the Public Prosecutor to request the judge in charge of preliminary investigations to hear a witness)