I can't imagine how Sheila's body could have been lifted from the bed to the floor without displacing the blood that was in her mouth and collected in the pouch in her neck. So any image of Sheila on the floor would show much more blood. Not just a couple of trickles. And if Sheila shot herself in the kitchen, then roused herself to move upstairs, she would have been covered in blood. Her heart would have been beating, adrenalin rushing, blood from the soft tissue in her throat would have poured out.
Mike, (and I know you read this) rather than fudge the issues, and pretend that you know all the answers, why don't you explain why Sheila looked like she had just been dragged from her bedroom? And can you be honest, once and for all, about the tampon case in the lounge? Why did it contain half of a torn tampon? It certainly wasn't the tampon that Sheila had in place.
Then we can discuss the call that Ralph didn't make.