Why so? Adam is only asking two questions. He's free, should he so choose, when he gets answers, to pose other questions as a counter balance. I don't see the point in throwing in questions which aren't relevant.
He can do what he wants, it's just that it's hardly likely that cops would just approach the relatives, or vice versa, there has to be other reasons or factors which made one or other party adopt such an approach, whilst at the same time, encouraged the other party to go along that evidential route!
A typical example, is the fact that there exists an officers report made by DCI Jones which deals with the rifle and silencer matters, which as far as I am aware, to date has never yet been disclosed to the defence! I can across an official document the other day where it mentions the existence of this report! I believe the contents of the report will confirm that Stan Jones was requested to re-attend whf on the first morning to collect the silencer and take it back to Witham police station and leave it on top of DCI Jones desk, which was what did happen! Also, that the silencer in question was later returned to the family by way of it being replaced back at the scene on the 9th August 1985, when handing over the keys to Ann Eaton! I have no doubt that at the time DCI Jones had possession of that silencer on his office desk that he would have examined it's condition thoroughly and that if there had been any blood or paint visible to the naked eye anywhere upon that silencer, that he would not have authorised 'its' return to whf a couple of days afterwards. I strongly suspect that the contents of DCI Jones 'Officers Report' into this matter has been deliberately concealed / withheld from Jeremy Bamber and his legal team because it's contents tend to favour that the silencer may have been deliberately contaminated with Sheila's blood, and red paint from the kitchen aga mantle piece...