To be quite honest Jane,i have no doubt Sheila MAY have been the culprit.Let me try and let you understand my thinking regarding Sheila.Ok,we all know you need a motive to commit a crime,and in Sheilas case this would have been because she was severely mentally ill.She had bizarre thoughts of good and evil and at times was what can only be described as insane.She WAS very ill,and this was ONGOING and hard to control.This is fact.With this in mind,i think it is fairly reasonable to believe she WAS capable of carrying out the massacre,IF another psychotic episode occurred.Anyway,that is my thinking anyway.So,motive is not a problem for me.The biggest problem for me,like many others i suppose,is IF Sheila was capable of using and re-loading the rifle.Although the fact there is controversy over whether APs rifle was present that night,as it SHOULD have been,may lessen this problem to a fair degree.As for Sheila being spotlessly clean,again this is debatable,especially with the illegal destruction of the night dress.As for the evidence that appearsd after the farm was vacated,and the witness statements after it became five murders,i generally ignore for obvious reasons.The evidence can only be described as dodgy,and the statements are contrived to suit.No the only problem for me is the handling of the rifle,and i cant find much info on the web regarding this.But what it boils down to is,Sheila had the motive,the means and of course the oppertunity.As did JB if you believe his motive was inheritance.So,to cut a long story short Jane,i still have doubt.