This might be the Irish person mentioned upthread as one of the victims the police were looking for
Rape victim asks Madeleine McCann detectives to review her case | Madeleine McCann | The Guardian
That sounds like a very definite connection to the 2005 rape of the 72 year old, right down to the machete style knife.
It's very concerning that these attacks happened so often in the area, to young and old, and yet investigators accused the parents when they publicized the disappearance of Madeleine. They should have been making connections to the string of similar crimes in the area a long time ago.