Pages 87 and 88 in CP's book explain how June was first suspected of the killings.
Page 82 of the same book is where I was damned to Hell over both the red and blue forum for having quoted what CP had written in her book referring to Sheila as a " poor demented creature ".
I never heard the last of saying " creature ".
Here is the context in which was written in,I quote," Gone was the anxious,sweet personality and in its place was a driven,tormented creature ",unquote.
Which was a description given by Sheila's friends as they noticed a huge difference in Sheila after her last visit/stay in hospital before the murders,and was how a friend had described her state of mind.