One important judicial issue that underlies the violations of defendant's rights in the Knox - Sollecito case is the resistance of the Italian judiciary against acceptance of the changes to the Italian Constitution and laws of procedure (Code of Criminal Procedure, CPP) made by the Italian Parliament in 1988 and later years, including the amendments to Article 111 of the Constitution in 1999 and the revision of CPP Article 533.1 establishing that a verdict of conviction shall {only} be delivered if the accused is proven guilty beyond a reasonable doubt. The word "only" does not actually occur in the Italian text, while consistent with the BARD standard, CPP Article 530.2 established that a verdict of acquittal must be delivered if the proof is insufficient, contradictory or lacking that the criminal act occurred, the accused committed the act, the act is deemed an offense by law, or that the offense was committed by a person with mental capacity {justifying legal responsibility}. CPP Article 530.3 established that the verdict must be an acquittal also if there is proof or {reasonable} doubt {demonstrating} that the underlying causes of the act are a reason for {legal} justification or a personal reason for exemption from punishment.
Prosecutors in Italy are different from those in the US and England/Wales in that they are magistrates, in the same branch of government as judges, but also prosecutors are legally responsible for directing police in the specifics of any criminal investigation, even though the police are organizationally under the Ministry of the Interior (Polizia di Stato) or the Ministry of Defense (Carabinieri). Italian prosecutors are legally obligated to not only investigate to discover evidence against a suspect, but also to carry out ascertainments on the facts and circumstances in favor of the suspect (CPP Article 358). However, according to reports in legal academic literature, prosecutors in Italy not only do not seek exculpatory evidence, they often do violate defense rights, according to a survey of 1000 Italian lawyers. (Quoted passage below)
This misconduct by the prosecution, which was clear in the Knox - Sollecito case, is thus apparently common in Italy.
...Di Federico and Sapignoli describe prosecutors as independent police officers who, in practice, do not fulfil their duty to be impartial investigators.
The authors conducted a large empirical study (involving 1000 lawyers): 48.8% of the lawyers interviewed reported that prosecutors do not comply with article 358 cpp which requires them to search for exculpatory evidence; 19.5% of the lawyers said that prosecutors search for exculpatory evidence only when the counsel pushes them to do so; and only 2.1% of the lawyers said that prosecutors always search for exculpatory evidence. The authors describe prosecutors as straight accusers that are prepared to play with the interpretation of legal procedural rules to achieve a conviction. This means that, for example, prosecutors do not respect the legal rules that require them to finish the investigation in a fixed time; that pre-trial custody is used to put pressure on accused persons even when there are no lawful justifications to do so; and that witnesses are not free to report what they saw and heard, because prosecutors put a lot of pressure on them in order to be sure that they will support the prosecution’s version of events. However, as Di Federico says, the case study only focused on the lawyers’ perspective; and, in general, his analysis is aimed at demonstrating that there is a sharp contrast between legal rules and practice. ...
Source:
http://openaccess.city.ac.uk/1577/
Adversarialism in Italy: Using the concept of legal culture to understand resistance to legal modifications and its consequences
Montana, R. (2012). Adversarialism in Italy: Using the concept of legal culture to understand resistance to legal modifications and its consequences. European Journal of Crime, Criminal Law and Criminal Justice, 20(1), pp. 99-120. doi: 10.1163/157181712X615258
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quoting: G Di Federico and M Sapignoli, Processo penale e diritti della difesa (Carocci, Roma 2002) p. 16 -17.
See also, G Di Federico, ‘Il pubblico ministero: indipendenza, responsabilità, carriera separata’ in G Di
Federico (ed), Manuale di Ordinamento Giudiziario (CEDAM, Padova 2004)