Matt wrote:

Here's a source for the 'three unidentified individuals' DNA' claim:

Thanks Matt. While my claim that there are not three unidentified individuals' DNA on the strap is tangential to C1, I will back it up anyway.

The Daily Mail is a tabloid, rather than a reliable source (in case the headline, 'The troubling doubts over Foxy Knoxy's role in Meredith Kercher's murder', didn't give it away) that clearly got the content for the summary article from Wikipedia. In contrast, the more reliable Sunday Times states instead that Meredith's, Rudy's, and Raffaele's DNA were found. Keep in mind that, as of the day before the Daily Mail summary story you mention, there was no media report (even in tabloids) of the three unidentified people; it seems likely the Daily Mail pulled it from either the Friends of Amanda site, or the prior day's Wikipedia, which has the (non-cited!) claim.