No, she wasn't and that was where Essex police made the fatal mistake when they staged her death scene, there on the main bedroom floor (after DS Jones and DC Clark had visited the main bedroom and left to attend with Jeremy at his cottage)...
Please, don't either you, or Jeremy, or anybody else try to insult my intelligence - ok, so Sheila was right handed, so how did she position the muzzle of the gun, or the silencer against the left hand side of her neck to shoot herself from left to right and kill herself?
Not many of you have got any brains, those that have will soon realize that Sheila could not have shot herself across the neck from left to right if she was right handed...
I, therefore, arrest your case!
Think about it (before you shoot yourself in the foot) How did Sheila Caffells trigger finger on her right hand activate the trigger mechanism with the anshulzt rifle (or as the case may be a second weapon fitted with a silencer) pressed horizontally against the left hand side of her neck? Nobody in their right mind would believe such nonsense, that neither you, Jeremy and anybody else, who purports to support the dishonest claim, that Sheila must have, or did shoot herself twice there in the main bedroom!
She 'did not' shoot herself twice, there in the main bedroom - she was initially shot downstairs in the kitchen, and the angle at which she was horizontally shot across her neck from left to right, points to the involvement of another person in control of the weapon which inflicted that first shot!
Carry on, with your nonsensical narrative, and Sheila being right handed - you won't be getting very far in a hurry (How did Sheila stretch her right arm against her chest and be able to activate the trigger mechanism at the correct angle with the muzzle of the gun in position against the left side of her own neck, and fire a shot horizontally across her own neck, from left to right)?
If Bamber is with you in this pathetic argument, then all I can say, is god help him, and you, also...