Here is an excerpt from a summary of the Italian trial process from an Italian law firm.
Note the first highlighted statement below. There were some posters here who claimed the Court of Cassation (CSC) did not have the authority to annul a case without referral back to a lower court. Of course, CPP Article 620 provides for such an annulment. And these lawyers are well aware of that.
Also note that once the CSC issues its ruling on a case, there is no further action allowed (except for a revision trial after a conviction, which is only allowed under certain circumstances, such as new exculpatory evidence or a judgment from the ECHR). This is established by CPP Articles 648, 649, 652, 654, and, for revision, 629 and 630 (and subsequent articles with details of the revision process). The second highlighted statement below points out that the final judgment in the Italian system is indeed final. A case ending in a final acquittal may not be retried.
And CPP Article 654 states that a final criminal conviction or acquittal delivered after a trial shall have binding effect in the civil trial on the accused person, the civil party and the person with civil liability who has appeared or intervened in the criminal proceedings.
Source of the excerpt:
http://www.canestrinilex.com/resources/trial/
A criminal proceeding usually takes place in three stages: the first instance (Court of “Assise”, Collegiate Court, Single Judge Court, and Justice of the Peace), Appeal, and Court of Cassation [Highest Court].
At first instance all evidence - witnesses and documents - is obtained, and it ends with either conviction or acquittal.
The defendant can appeal against the first instance sentence.
The Court of Appeals takes its decision by either confirming the first instance sentence, or by reversing it partially or totally, or it may quash it by sending it back to the first judge.
You challenge the decision of the Court of Appeals by petitioning the Court of Cassation [the Highest Court].
The Court of Cassation pronounces the judgment by which it states that either the petition is not admissible or rejects it, or
even quashes the sentence without sending it back, or finally, it may quash the sentence and send it to the trial judge.
Once all the stages of judgment are over, the sentence is final. If there is a conviction with a sentence, the sentence becomes enforceable at this point.
Read more:
http://www.canestrinilex.com/resources/trial/#ixzz45sMPc0gp
From the same source, here is a very brief history of Italian criminal law:
The Italian legal system is that of a civil law State, governed by codified law. The Italian Code of Criminal Procedure contains the rules governing criminal procedure in every court in Italy.
The first and initial code in the Italian Republic was established by the Fascist Government in 1930 and was kept until 1988. This code adopted an inquisitorial system. In 1988, a new code was enacted. This chose to abandon the inquisitorial system, but did not go so far as to represent a complete transition to an adversarial one. The resulting system could be considered to be somewhere in between the two (although it is closer to being an adversarial system; please read more about the "Frustrated Turn to Adversarial Procedure in Italy").
Read more:
http://www.canestrinilex.com/resources/trial/#ixzz45sQfIiHD
It may be of interest that the legal literature article these Italian lawyers recommend to understand the complicated history of the Italian system is by Professor Illuminati, whose article I have briefly discussed in several posts here. He states in his article that under the inquisitorial system, the trial was often merely an endorsement or reading of the investigating judge's* results. Traces of that approach are detectable in the Knox - Sollecito case in some of the trials.
*The investigating judge was the official who gathered information to present in a case file to the prosecutor and the judge.
ETA: More history from the lawyers:
In the first years after the code’s adoption, it became clear that the newly introduced system had not been completely accepted by the main criminal justice actors, especially the judiciary. This hostility to the 1988 reforms generated two divergent strands of law. Many of the new provisions were nullified by Italy’s Constitutional Court—thereby restoring the old system and frustrating the code’s strict separation between investigation and trial—and other provisions were interpreted and applied by the judiciary in a way more consistent with the previous inquisitorial model.10 In 1999, however, Parliament amended the Constitution and largely reinstated the accusatorial model. With limited exceptions, all evidence in criminal cases now must be presented at trial, in front of the parties and an impartial judge. Investigative records and police testimony relating to statements collected during the investigation may only be introduced at trial to impeach a witness’s testimony.
Moreover, a defendant cannot be found guilty based on evidence from a witness who has refused to be scrutinized by the court process.
Read more:
http://www.canestrinilex.com/resources/nuova-registrazione-blog-2/#ixzz45sWmHKng
ETA2: The last bit, about the witness who has refused to be cross-examined, applies to the Knox - Sollecito case. The corrupt Italian prosecutors and (some) courts (including the Chieffi CSC panel in its MR) tried to introduce Guede's statements which had not been examined. This was called out as unconstitutional by the Marasca CSC panel in their MR.