I know exactly where it was found and I know all about the gun cupboard underneath the stairs, it was a cupboard about 4’feet tall tapering down to about 8inches at the far end due to the stairs, it was 4’6 inches in length and 3’ in depth. The silencer was found at the far right of the cupboard against the back wall. So in my view, I think it was hidden, and in your view, it was Stan who climbed through the WHF window and cut his finger and placed his own blood on the silencer and put it at the back of the gun cupboard ready for the relatives to find, do you think he managed to secure the window on his exit or did he just leave it unlocked?
You do not know exactly where the silencer was found. We only have DB's account. No one has ever suggested it was hidden
If such a scenario presented he would simply have walked out one of the exterior doors closing it behind him. Why would he need to exit via a window?
Either DS Jones contaminated the silencer pre relatives finding it. Or the relatives lied about its found state and DS Jones contaminated the silencer after collecting it from Oak Farm having sat drinking whisky with PE until the small hours.