The 205 page training manuscript describes how senior officers set out to present Sheila's death upstairs on the main bedroom floor as a suicide she having shot herself once by use of the rifle which was brought from an adjoining room window!
How the rifle was loaded and unchecked or made safe!
The possibility that an officer activated the trigger mechanism whilst manipulating the right hand and fingers of Sheila in the vicinity of the trigger! How shocked everyone who was present were when the rifle discharged the second shot which effectively killed her! How resourceful senior officers were in disguising what had taken place by presenting Sheila's death as an apparent suicide, where she had shot herself not once but twice by use of that rifle! It deals with the question of the second shot going off due to recoil, but with an underlying problem relating to one of the two bullets not having been fired by that rifle (the original PV/20 badly fragmented bullet), which needed to be substituted with a test fired round fired via the anshuzt rifle once the nature of the investigation changed from four murders and a suicide, into five murders!