I don’t pretend to know all the intricacies of the loopholes and pressure points that expensive lawyers can exploit, however, if you take the time to watch the vid in the 1st link, it mentions that Rolf was arrested 5 months before it came to press…
If a certain singer (who appears to have been well acquainted with Jill Dando) was more famous than Rolf and perhaps had dealings with politicians, along with the Krays and other powerful elements of the criminal underworld, combined with the very best in legal support, it would be fair to assume they could pull the strings.
After all, it appears that whilst alive, Savile had enough clout to get the home office to intervene on a journalists investigation of Jersey…