Raffaele had tried cocaine when he was younger and this was admitted. There was no evidence that they were on any drugs other than pot and no evidence of any other drug use other than pot on Amanda's part. This is just unsupported speculation just as a 14 hour (continuous) interrogation of Amanda is unsupported by the facts.
Post mainly for Katody:
Amanda said that Raffaele had used cocaine and LSD but I don't think there was anything said about how long previously. Mignini mentioned this in his summing up and it isn't contended that she said it in interview. Poster Jools helped me with some contemporaneous reporting of it.
See this article:
...In her statement Ms Knox claimed that Mr Sollecito had confided to her that in the past he had used cocaine and acid and that he suffered from depression. Mr Sollecito claims that on the evening of the murder he was at his computer until 1am, but police tests are said to have disproved this.
...
http://www.timesonline.co.uk/tol/news/uk/article2922381.ece
And also see this article re prosecution closing argument, here:
... "The first accusers of Amanda and Raffaele were they themselves," he said.
But despite frequent references to all three suspects -- Mignini clearly painted Knox as the mastermind of the crime, an aggressive young woman who harbored hate for her goody-two shoes English roommate and exerted powerful influence over the other two male suspects, who were infatuated with her.
He also mentioned Sollecito's alleged past use of cocaine and LSD...
http://www.seattlepi.com/local/412504_knox20.html
We don't know what happened that night. My own theory (NB theory) is that Amanda met Rudy at the baseketball court (see her accusation against Patrick transplanting this) or in Corso Garibaldi when she went to work that night (corroborated by the different cellphone tower at Via Aquila) and she asked him if he had any stuff for her to have a little party with Raffaele. They went hooked up with him later at a pre-arranged time and went back to the cottage to jointly indulge in this. My own theory, pure supposition, is that this was harder drugs although Knox's Marie Pace story also has them drinking a lot. The cellphone tower is fairly devastating evidence which the defence has done nothing about substantively given that Knox steadfastly maintains she never left the flat and Raffaele has never retracted his statement she left to go to work.
Now pure hearsay and supposition which has no proof, so look away now: we are also in contact with a number of people in Perugia who knew both Knox and Sollecito. Their version is that he was well known for being a complete dope head (he said that he spent 80% of his time stoned on his myspace) and that he had a reputation as a bit of a spoilt daddy's boy who had a cocaine habit. Not use. Habit. Again, not a shred of evidence of this, simply hearsay but from very connected people.
Knox also perjured herself concerning drugs (at least under our legal systems - you're allowed to lie in the dock in Italy) when asked in testimony how many joints she had that night. She replied "one". See youtube video of her testimony. Yet, if that were the case, how can that possibly be reconciled against her diary (also evidence) where she writes: "
I will never smoke marijuana again. When they free me I will go back to the United States, but I will come back to Italy to study. I’m not afraid of this country, it's part of me now. This is place I call home. And before all this happened I was so happy" . Elsewhere in her diary she wrote "That night I smoked a lot of marijuana and I fell asleep at my boyfriend's house. I don't remember anything."
I find it very striking that both Knox and Sollecito both swear in absolute terms that they will never smoke marijuana again. I believe this is because of their regret about what happened that night. In Sollecito's case he blamed his poor memory of the evening because he smoked so much that night so it's understandable. In Knox's case, since she only smoked one joint before bed time (see youtube) why would she make such an absolute statement? Little 'tells' like this are important. I think it's pretty clear she lied under oath about having just one joint.