The defence rights of a suspect - in a logic of fair trial - have to be seen as conditions provided altogether: when a person is put under arrest, has the right to speak immediatly (with no delay) with a judge (within 48 hours), and there is a legal bond for the judicial office to make so this hearing with the suspect takes place immediatly. The office called G.I.P., which means judges for the preliminary investigation, always have a judge on duty for all cases of arrest and detention. The detainee has also the right to be assisted immediatly by a lawyer from the beginning of the detention, while the beginning of detention is considered by the time of validity of a decree of arrest. There is no right to have a counsel with the attorney prior to the GIP hearing. There is no rule that specifies that the detainee and an attorney must meet earlier in advance, to "prepare" for the GIP interrogation, no rule says this counsel must take place prior to the judge hearing. The right to legal assistence is immediate but not meant to be more immediate than the other immediate actions.
And meanwhile Raffaele was not "without rapresentation", properly he was without legal counsel during the time of his detention prior to the preliminary investigation judge hearing. Without a counsel in advance, obviously some defensive choices cannot be made, but the system is obviously not meant to allow the atorney to "properly prepare" the suspect for his appearance before a preliminary investigation judge. The GIP is, after all, an investigator as well as a judge, his task is to protect the quality of the investigation, not just the interests and rights of the arrested person.
If Tedeschi had any problem in finding the decree of differing, instead of just getting angry, he could have raised an objection to the questioning, since he spoke before Raffaele Sollecito. But this objection is missing. So because of the lack of this objection, while Amanda refused to speak, the interrogation of Sollecito took instead place, Raffaele made statements and answered the questioning. Only very late, before a court of Assise, the defence raises again the point, as after having realized they don't like Raffaele's statements, now they seek an opportunity to dismiss them.