I have just skimmed through Barlow's notes again. Few things I have noticed
He goes into alot of detail of what was said between him and Robert Boutflour and on what date. Such as Windows, Bikes, Silencers and tampons, Brett looking like a poof ect ect. Yet I cannot find it mentioned anywhere of Jeremy telling RWB he could easily kill the family. Had such conversation taken place between JB and RWB, one would have thought RWB would have put this on the agenda with Barlow. Its certainly more important than Brett Collins appearence.
RWB also told Barlow that Nevill would never have let Jeremy shoot rabbits. This is a lie, rabbits are an invasive species to farmlands, they eat the crops and breed very quickly. Moreover Nevill bought Jeremy a gun designed to kill rabbits.