The rifle was found on SC's body sans silencer. JB's relatives found the silencer at the back of a cupboard when they went into the farmhouse on 10th Aug ostensibly to clean and tidy up. Their w/s's conflict as to who was present when it was found, its state and what exactly happened to it until DS Jones collected it from the Eatons farmhouse on 12th Aug. DS Jones was supposed to enter such an exhibit into a particular 'property' book. He failed to do this meaning it avoided the type of scrutiny such a find would normally undergo. On 13th Aug DI Cook took the silencer to the FSS lab at Huntingdon for forensic examination along with other exhibits.
Glynis Howard was the scientist responsible for examining the silencer. I've uploaded a diagram describing the blood on the outside along with parts of her trial testimony relating to the silencer.
The relatives conflicting accounts include observation of blood and paint on the outside.
DS Jones and DI Cook claim to have observed a single grey hair but this was lost before it reached the lab.
Glynis Howard's diagram and testimony make reference to the blood only. Why does she not make any reference to the paint?