He or Nevil could have shot rabbits previous to the night of the murders.
One of the complications of there having been two different silencers / sound moderators, at the heart of this deception, was that insofar as the blood found on the outside of (let's call it) the first silencer, Glynis Howard, had identified that blood as 'human blood', whereas, in April 1986, the same blood from the same area or let us just say in close proximity to the area where Howard had previously identified the blood as human blood, the blood mysteriously became identified as animal blood!
So, here we have disparity on one silencer, versus the other silencer, that it was human blood detected in the first silencer (b) SJ/1 (22), but it was animals blood in the other silencer (d) DRB/1 (22)...
Being the inquisitive spirit that I profess to be, the only explanation available, where both human blood and animal blood, could possibly be present in the same silencer (b) and (d), must involve the blood group activity AK1..
Now, irrespective of whether or not, any of you can grasp what I am talking about, with regard to there existing two different identical Parker Hale silencers / moderators, (which was / is true), we end up with one of the four positive blood group results (AK/1) attributed as being unique to Sheila Caffell turning out to be described in the first instance (immediately after 13th August 1985) as ' human blood'. Thereafter, in April 1986 that same blood (AK1) is being described and recorded as being animals blood!
With this in mind..