Raff has a strategy, which has paid off for now, of distancing himself from it all. As long as people think of Amanda as the baddie, then he can pretend he was just the patsy who got caught up in it, a ruse papa Raff suggested early on (there was a furious exchange of phonecalls between him and his boy the morning of 2nd Nov 2007).
The stuff about, "I wish I had never met Amanda" or "She asked me to lie for her about going out that evening", was just Raff following his papa's suggestion of blaming it all on her. Problem is, he can't name Amanda blatantly, for she would soon reveal "all" about him, if she were convicted, and him not. So we have witnessed an entertaining version of The Prisoners' Dilemma between the pair of them, each subtly threatening to throw the other "under the bus", hence Amanda's dark hints about seeing blood on the back of Raff's hand or his rubbing her fingerprints onto the knife whilst she slept. Note her informing the police of his drug habits and mental health issue with depression.
Both said they'd never take drugs again, after the murder.
Clues come from the police and prosecutor. It was Raff who came under the greatest police suspicion, not Amanda. They were certinly convinced of his involvement. You only have to watch the video of their search of his apartment. PM Mignini described Raff as "icy cold" in his closing submissions to Matteini, as well as bringing in the manga aspect Marilyn Manson fan worship, not to mention his knife fetish. Bearing in mind Raff being a middle-class young Italian man, the claim police were burning with desire to pursue "the American Witch" can be seen to be the distraction it really is, as put forward by Friends of Amanda, when in truth, police were pretty sure of Raff's culpability.
When Stefanoni carried out the DNA testing, she was not to know in advance the defense expert would not turn up, so IMV it is really reaching to imagine Stefanoni could manufacture Raff's DNA out of thin air. Remember, she is Italian and so is he. No "Ugly American" prejudice there, as FOA keep claiming as the motive for police framing them.
I see Raff and Amanda as two immature thrillseekers, together with Rudy, all reckless, irresponsible bored youth looking for kicks. After halloween Rudy made a video in which he pulled grotesque faces and rolled his eyes back saying he wanted to drink a vampire's blood. Raff's manga book found at his apartment, Blood the Last Vampire was set at halloween and was about a female vampire slayer.
Kokomani who was near the cottage on the eve of the murder, as per cctv and witnesses who saw his vehicle, told police he witnessed the three drugged up to the eyeballs, hiding behind the cottage bins and wielding a large knife. Like Aviello, he, too, claimed he'd been offered €100,000 to drop his evidence on behalf of the police. There are Raff and Amanda's social media pages. There are independent sources testifying to Amanda's reckless behaviour with sex, drugs and money, and Raff's extreme FB pics and comments.
So, no, not an unusual psycho murder insofar there have been several by unbalanced youth, the guy who had never had a girlfriend, Cho of Virginia Tech who could not make friends, the Scream murderers, only 16 at the time, who killed a classmate for sheer fun and videoed themselves bragging about it (and which got them convicted), one of whom claims to be innocent, then we had high school shooters in Finland, weird youths with guns, copying Columbine and Virginia Tech. Meaningless, trite, futile murders of random innocent peers who had never done anything to them, except exclude them from decent social circles because of their erratic egregious behaviour.
No, IMV Raff did not act alone with Rudy, with Amanda covering up because she witnessed it. OTOH he definitely isn't the affable foppish patsy he presents himself as. I can quite see him as a ruthless killer who did it for kicks. Their justification being they were bored, it was halloween and they imagined Mez to be the vampire and themselves the vampire slayers, possibly under the influence of LSD or perhaps cocaine or "speed", which enabled them to stay up all night plotting what to do about their crime.
They have no alibi, Raff refused to give evidence, and their sole defense seems to be "We know you know we did it, but you can't prove it. Ha!"