Looking at the Brian Stow situation, I actually was thinking that the Italian system seems less error-prone. Imagine if Giovanni had said something along the vein that Amanda had said?
It's interesting if you think back over the case. If Amanda hadn't falsely implicated Lumamba, then the DNA indicating Guede would have come in while she was still walking around free. There would have been no investigation of Sollecito's place and so no knife, and there wouldn't have been an additional DNA sweep weeks later that would have gotten the bra clasp. She probably wouldn't have been tried at all.
If I was operating off a presumption of guilt, I'd have to think that Amanda and Raf left their flat shortly after Amelia finished playing, in order to pack up Amanda's things to go to Gubbio the next day. They left their turned off cell phones behind in their flat. They ran across Rudy at the basketball court (Amanda said she met Lumamba at the basketball court, so she would be lying as closely to the truth in case there were witnesses). They proceeded together to the cottage and arrived at around 9:45.
I don't know what happened next, but because there is no evidence of blood on clothing and no evidence of cleaning up of DNA in the murder room or hallway, the only thing that makes sense with the evidence provided is that they were naked and attacking Meredith while Rudy was clothed and attacking her. OR, Rudy attacked and killer her and fled, and Amanda and Raffaelle exited from her bedroom at around 11:30pm and found her in her room dead, and Amanda screamed (the scream heard at 11:30). They then got very bloody trying to figure out what happened? Oh, I don't know. The point is, if they were present, they were involved in the attack in such a way that they got no blood on their clothes, only on Amanda's bare left foot... so it must have been close to the time of death so the blood would still be wet enough to get on her feet, but also wet enough to mask her bare footprints in the room.
OR, they only got blood on their bare skin, then they went into the bathroom to wash off the blood, getting blood to fully cover the bottom of Raffaele's foot, and to cover the bottom of Amanda's foot. For some reason, in each scenario it is their left foot. Actually, that makes me think the bathmat print would be Amanda's.
Anyway, teh blood comes from washing off the blood from skin (not clothing) on another part of the body. Oh wait, and that was done in the bidet.... then after cleaning her feet in the bidet she entered the shower with Raffaelle, and they washed off the traces of the murder. The showering has to be done right after the murder to explain the footprints.
Next they needed to come up with a plan to hide their involvement, so at this point they threw away the phones. They have Amanda's keys to lock the door, but they remember they need to retrieve Meredith's keys to make it look properly staged... so they go into her pants or purse to get the keys, but don't leave their DNA while doing this. This is probably when they bring in Amanda's lamp to see. Maybe THIS is when they get blood on their foot, and then they have to hop around to prevent leaving lots of bloody footprints.
They remove what evidence that they can of the fact they were there. Except for the bloody bathmat print. Actually it seems like they just staged a robbery and nothing else, since there's no evidence of cleaning up the murder scene. And there should be swipes seen in the luminol if that was done. Did the bathroom look wiped down?
So they only bother going so far as to make it look like there had been a robbery? And they go back to Raffaele's apartment and turn on his music at 5:30 am. Maybe they went back to his apartment around 12:30 and slept for 5 hours, then went back to the flight at 6amish to stage the scene before Filomena would turn up. But only Amanda went back at that time.
And they went back to Raffaelle's flat and super cleaned it so there would be no trace of any murder evidence there. But they didn't do this at the cottage.. but that's why they have the mop. Because they certainly don't care about a broken sink if they have a murder to cover up. That's not why the mop is there. So why is the mop there?
And they call Filomena so she will meet them at the house and so she will be the one to break open the door? Or so her DNA will be interspersed in the scene? And then after calling her they wandered around with a mop?
The mop only makes sense if they wanted to provide an excuse for a clean up. And the bathmat boogie story only makes sense if Amanda knows that she cleaned up the hallway. Because if Amanda is the murderer she knows what evidence might be there to convict her.
If her breakdown about the knife is a legitimate sign of guilt then that means the knife used to kill Meredith was in the flat. Most likely the knife that was in her suitcase, that was stolen. But if that's true that means the knife at Sollecito's is false, and the prosecution has contaminated evidence.