Actually, the copyright of the photo was owned by a photo/media agency (was it barcroft media?). It was not a photo, but a set of photos.
Can you attribute the selling of the photos directly to the photographer?
Actually, I think we can't. The photos in the set in fact did belong to the investigation file. Is it possible that someone at the police office put their hands on the file and sold the photo set? It is obviously theoretically possible. But even someone who was not a police officer could have done so. (I'm not kidding; I'm saying even a person who is not a police officer coud have well sold the photos; in fact, Sollecito's father did sell crime videos to Telenorba, for instance).
As for my direct experience, police officers often take pictures on mini-cameras (as non-expert photographers) and they put them in their reports (even in internal reports, or to other departments or other offices).
And lawyers from all parties in a case can, in fact, require to access police archives and access most reports and documantation (including photos).
I know this because I did so, I sent a lawyer to access police reports about car accidents, at the Carabinieri station, reports which included pictures that were not deposited at the court clerk's office.
This said, to your questions, my answers are:
1)
I can't recognize the man for positive identification; the picture is useful to me only as "negative comparison"
aka to rule out someone. I can rule out Mignini, because the real Mignini is really too tall to be that guy (and actually, the real Mignini is not that fat).
When I say Mignini is tall, I mean really tall. Had you ever met him in person, you won't confuse him with that guy. 2) Yes I would idenify him if I could. But I cannot say anything more than something like "probable" identity" (given the context) with Profazio, and "incompatible" with Mignini.
3) No I do't know what happend to his pictures but I guess they ended up attached in some "informativa" (report), as I explained. There, someone (I guess lawyers from one of the numerous party as most likely) picked them and leaked them (maybe to a journalist). Then maybe the journalist sold them to an agency. They ended in Barcroft media agency. They were leased to the Daily Mail (a paper which "re-writes" and apparently misreports, as someone may point out) who chose the bathroom picture.
4) I have no idea about where, what files, specific pictures were deposited. But the concept of "turned over" may be misleading. The fact that a file exists in one of the files and is not deposited at the court file, it does not mean the defence or parties cannot access it on request.
5) No. I don't think the person who took the pictures was the one who sold them. Even less that he/she sold them directly to a British tabloid.
6) There is no police investigation to determine how the photo made its way to a newspaper, as far as I know, and I can tell there will be no investigation ever. This is a non-issue to Italians and Italian law. Nobody care about these things; while the Italian law does not prevent just any person to leake those pictures to the press. It is not illegal for a lawyer to access a police file, and it is not illegal for some private citizen to give the pictures to someone else. What the Daily Mail did, moreover, was off the Italian jurisdiction and anyway was not an object of any formal complain. There is actually nothing illegal to investigate.
7) Mignini has never spoken about the issue of the bloody bathroom picture, as far as I know. I won't even bet he knows the issue exists, as a discussion topic somewhere.