I'm actually reading Doctor Craig's statement /findings as he entered WHF that morning. He'd been told it was a siege prior to him entering.
When his investigation came to Sheila,he clearly stated that,quote " Sheila's body was on the floor with a rifle lying lengthwise on the body,with the muzzle pointing towards her head and I think the right hand was on the butt : the appearance suggested that she had taken her own life.I only saw one gunshot at that stage "-unquote.
Dr.Craig had first spoken of how he'd found Neville ( who he knew ) which tells me that he'd gone straight into the kitchen when he saw two bodies.There was no mention of him going upstairs at that stage ?
The doctor went on to say that " when he'd left the house there was clearly an assumption by those present that the incident was a murder/suicide.I didn't dissent from this ".
" The reason I accepted this theory was based on what I had seen added to the facts related to me by Ch.Supt.Harris."