Prosecutor speaking after the hearing of the ship's captain

The transcript discusses the investigation into Commander Schettino, who confirmed he was in command during the ship's impact. The prosecutor has requested the validation of his arrest, and the judge is considering the decision. Due to investigative secrecy, certain questions cannot be answered.

Quale misura cautelare è stata richiesta dalla Procura nei confronti di Schettino?

Perché il testimone non può rispondere alle domande poste?