I feel awful for the McCann family if this is the nearest that they've ever got to answers and it doesn't come to anything. And all the publicity and stories that have been put out in the last few days!Personally I doubt he is involved. Portuguese Police knew about him in 2007 and searched his van, he was dismissed. Scotland Yard had the files from 2012 and didn't flag him up, not the phone call his past history none of that was enough to make him stick out to them. They now say they are open-minded about him being a suspect where as Germany have known about him since 2013 but don't have enough to charge him.
There has even been talk of German police monitoring him in jail hoping he will confess, that's not much to go on.