Mach,
Let me see if I understand this correctly.
The police can question people about a crime freely. When they are not suspects, you refer to them as witnesses. A witness is obligated to talk to the police and tell them the truth fully. The witness has no right to have a lawyer or anyone else present. A witness can have his phone calls intercepted by the ILE (without a warrant?), be followed, live conversations recorded and more. Can their homes and cars entered without a warrant?
No. In order to do a phone wiretapping there must be an order by the magistrate or by the preliminary investigation judge (which is anyway secret). These orders are very frequent in Italy. Homes and cars can be entered at the same conditions if the police have an investigation order by the judiciary. If the person becomes a suspect, the prosecution has the right to delay the release of this information to the suspect for six month, up to a year or longer. So the prosecution may "keep secret" to someone the fact that they have colelcted evidence against him, at least for a period of time. However, the person must be told he is a suspect if he is interrogated and there is already evidence collected against him.
The witness can be a suspect during this period but they are not an official suspect until the police decide to call them that or if they admit to involvement in the crime.
It is not that the police decide; it is that there must be some evidence collected on them by the prosecution.
After they are declared a suspect they are entitled to a lawyer if they demand one and all interrogations must be recorded.
A person is always "entitled to a lawyer" in a certain sense, but not entitled to having a lawyer assisting him during an interrogation and intervening. And anyway, not a defence lawyer appointed by the state.
If one becomes a formal suspect then is entitled to all these things.
The risk that someone is questioned as a witness for "longer" while instead there was already some evidence against him, is a risk in a degree intrinsic to the system. This risk is also provided as a possibility in the procedure code.
However, the police can deny access to an attorney or anyone else for 48 hours when the suspect makes an appearance before a judge (Gip, Gup?)
No, the police can do this only in case they don't find a magistrate in a shorter time. The magistrate can do this for another 48 hours, waiting for the hearing before the preliminary judge.
and without the benefit of talking with an adviser has an opportunity to rehabilitate their statements made while a witness that made them a suspect.
By not rehabilitating her statements at this point she was in fact guilty of calunnia, right?
The calunnia is committed in the first moment as she gives a false witness report; then the crime is repeated as she releases further statements against Lumumba. These statements cannot be rehabilitated; they could only be justified or retracted, justified by ascribing them to coercion or retractd by admitting to having lied out of fear and explaining what was the truth.
But the crime of calunnia, while committed in these statements, is defined as crime and proven to be a crime by her later conduct, her failure to retract, clarify and explain the statements that she had released. Essentially her keeping that position during a time when she had possibility to clarify ( and also had legal assistence).