Robinsons were paying, and I guess acting as his agent in the dealings with Macdonnell. I think at the time JB decided to commission this report his line was that the silencer was used, but that the blood within it was not Sheila's, rather it was a mixture of Neville and June's.
I think that the reason Robinson was involved was make sure his company had sales for a book by Roger Wilkes.
Its clear that JB must have had contact with Mcdonnell and sent him some photographic evidence.....I do believe that in the end Wilkes turned his back on him and, had more to do with the relatives than he did with Jeremy. I know for sure he visited them, but I wont reveal my source...Sorry for being a pain....I sometimes miss posts and when I go back, my questions have already been answered....sorry for that....

:D :D :D :D
It just means that Sheila could not have shot herself with the silencer on....we already knew that was likely to be impossible...I suppose I have to congratulate Wilkes that he went that extra mile to gather evidence for his book....I wonder what McDonnell would have said in his findings if there was no mention of a silencer....would he have said it was possible for Sheila to have shot herself, because it is likely that she could have... :D :D :D