I disagree on your last point. I think it would simply then be a matter of who the court found most credible on the stand, and I can't see any reason for them to automatically conclude that Guede is more credible than the other three witnesses.
That he would lie about what he said is obvious, since it's a change to the story he told during the trial. But if the defence lawyers are allowed to question him and he tries to stick to the obviously false 'date with Meredith' story, then it will be clear that he's lying, and in that context Alessi et al's story might even appear the more credible. The jury won't need to conclude that Alessi's story is categorically true, but even if it could possibly be true that casts some doubt on things.
The fact Giacomo Benedetti is being called to testify also seems significant; Guede won't be able to deny he told Giacomo that Knox had nothing to do with it because the conversation was recorded.
If the defence lawyers are able to ask Guede why he said Amanda wasn't involved and then changed his mind, that could be interesting. Another option for the defence could be to push Guede on whether or not he can positively identify Amanda and Raffaele as the people there that night. What if he says he can't be certain it was them? (not so different from what he's said already, after all). We know of course that, one way or another, he's lying through his teeth, but still, "Rudy says Amanda and Raffaele weren't there" makes for very good defence headlines.
I think the point of the defence strategy here is reasonable doubt, and it's starting to look like a surprisingly good move. On reading PMF just now, I noticed that some posters there (apparently finding Alessi and Aviello credible) interpreted yesterday's witnesses as meaning there can now be no argument about multiple attackers and a staged break-in. I don't see it that way at all: I think what the defence are hoping to convey to the jury is that even if you believe there were multiple attackers and a staged break-in, there is still reasonable doubt that Amanda and Raffaele were involved. I'd thought that requesting Alessi and Aviello could backfire on the defence, but actually it now seems like quite a shrewd strategy.
If Rudy sticks to the same story in court, it will be no surprise.
What's the motivation for Rudy to help someone?
Why would a convict help the system?
Do convicts risk further punishment in Italy? If so, they have nothing to gain. If Rudy snitches on his cohort in murder, will that help him in prison?
I have spoken to a few from various prisons, and jails, and asked them if discussing and talking about the crimes, they're serving for, is common.
All said most definitely. They said the inmates spend a lot of time discussing their crimes and other personal issues. So with this info, I tend to believe Rudy was discussing the crime. He's had a lot of time to do nothing but talk to his new-acquaintances. Being a high profile case, it would be well known inside what Rudys situation is and create attention from others.
So with this small set of data, I tend to believe over these years, Rudy has talked about that night in probably more detail than we know.
Very likely, imo, Alessi and convicts from the break area, know more about that night than Maresca, Girgha, Mignini, Matteini, Massei and all the the rest combined.
As for the other convict, who says he has the keys and knife... buried, this is a "put up or shut up" situation. This seems a easy one to disqualify quickly.
So it seems Rudy reappears, June 17th?
What is Judge Hellman expecting to gain from this?
I do think Rudy could answer a few more things without completely telling the truth and remaining "safely" in his current position. A few more slips of the details would be interesting.
For instance, I think Rudy could spew some more details while maintaining his position.
The blood in the bathroom and the partial-footprint could be explained. Rudy already admitted to going to the bathroom twice for towels. Adding some detail might help.
If he were to explain the bare footprint and the blood smear on the light switch, and even the tiny blood sprayed patterns, it would be helpful for finding the truth. Maybe the lamp movement?
I don't know Italian law, could Rudy be punished more for changing his story? If so, we c an expect nothing from him.
off topic....
This weekend there was the famous Vancouver kiss picture on the news, in the interview he said she was stressed and he was only comforting her.
Most found the picture beautiful and romantically sexual.
But when Raffaele did the same, possibly, "comforted Amanda", it was viewed as ugliness by so many. This was seen as a cold hearted kiss, a suspicious response by Raffaele and Amanda after Merediths body was found.
perspectives can be so different.