3. Amanda Knox's Account
Though well known to followers of the case, it's worth briefly recounting Amanda's testimony of the interrogation. During her testimony, Amanda stated that police called her a "stupid liar" and hit her on the back of the head after Knox denied she was lying. She further stated that the officers kept suggesting Patrick Lumumba's name. In short, suffice it to say that Amanda has continued to claim that she was not treated well by the police. Her version of events certainly indicate an interrogation that was accusatory in nature (though Perugian police claim she was not a suspect....), and certainly tense.
The Elephant in the Room: The Audio of the Interrogation
No one can really seem to answer whether an audio of the interrogation actually took place. It is difficult to believe an audio recording does not exist, but prosecutor Giuliano Mignini in the recent More4 documentary (Directed by Garfield Kennedy) alleged that no audio was ever taken, citing the excitement surrounding the accusation of Patrick Lumumba. They simply "forgot" to record it. So we have two options: (1) An audio or video of Amanda Knox's interrogation was never recorded OR (2) an audio or video was recorded. Pretty simple competing trains of thought here. So let's look at both options.
1. The Interrogation Was Never Recorded: It is very hard to believe that this was the case for many reasons, but the one that sticks out the most is the fact that they were recording everything else Amanda and Raffaele were saying. This fact has been known going back all the way to 2007. As reported on Dateline NBC on December, 21, 2007, "By [Saturday, Nov. 3] authorities were bugging every phone call placed and received by the young lovers." Every phone call! The police were more than happy to release what they felt were incriminating statements to the press from these bugged conversations. (Another exploration to consider: It's very strange for the police to be bugging the two since they were supposedly just being treated as witnesses....).
Even if we take Giuliano Mignini at his word in describing the reasons for the lack of audio tape, we still have to deal with the fact that he wasn't there for the portion of interrogation where Amanda claimed she was hit.
So there are many unanswered questions. The police were tapping the phones of Amanda and Raffaelle. We know from the testimony that they were suspicious of everything they were doing. We know that Giobbi testified that both Amanda and Raffaele were called into the police station, not of their own volition to help as witnesses.
Something isn't adding up.
(Note: You can also read Mignini's explanation in Italian here.)
2. The interrogation was recorded: If this is the case, then the audio was either lost (reeking of incompetence), and the police are lying about it, or it was thrown away, and the police are lying about it. If the audio of the interrogation has been destroyed, the question then of course is: why? You would think the Perugian police would have no problem with any tape of the interrogation being played if the tape would actually confirm their testimony from the trial. So, if the interrogation actually was recorded, observers have legitimate reason to believe in some sort of cover up by the police, or at the very least, absolute incompetence in losing such a crucial piece of evidence.
Conclusion: One can subjectively come to the conclusion that Amanda was or was not hit (I think it's obvious where I stand on the issue). That being said, for Manuela Comodi to explicitly say that no investigation was necessary where there are a multitude of questions needing to be answered in order for any sort of slander to be proven is extremely showing. Certainly the actual court statements during Amanda Knox's murder trial are not enough to prove anything in regards to slander one way or another. Thus, any way you look at it, Comodi is either amazingly corrupt or amazingly inept, exhibiting a pathetic lack of diligence to follow through with basic inquiry that is in the interest of justice. Of course, this is the kind of situation one can expect when we ask the same police who are accusing defendants of slander to investigate themselves. The police will always win that one.