I can never understand why he shot her twice.
She would have bled to death and time was on his side. With just shooting her once.
It must have been a knee jerk reaction from him.
If I put myself in his situation I would have immediately panicked having shot an intended suicide victim twice.
The trouble with Bamber, he had to move quick and get out/home to make the call, he had two choices leave her alive and hoped she died, or make sure himself, i suppose this goes back to what we discussed ILB with Neville, Sheila didn't have to make sure everyone was dead, Bamber did? the Killer had seen it was taking a lot of shots to kill everyone, so he possibly thought that one shot wouldn't do it in the end?