If the truth be known,Patti,it's my belief that if someone tried to rescusitate Sheila,then clearly whoever it was, either didn't think she was dead at that time and thought it was worth trying to revive her, but certainly wouldn't have bothered if she'd looked pale/grey,which would have indicated her death.
Even a weak pulse will prompt anyone to put that person in a recovery position.
Any marks on Sheila's body would account,possibly,for someone performing CPR,as sometimes injuries can't always be avoided.
The pictures are pretty misleading Patti,as they're copies of copies.Original negatives are the ones to go by. In some pictures of Sheila,she just looks asleep,and not like the cadaver that I'd imagine.
It wouldn't appear to me that there's any RM, LM,or Algor mortis. ( which is the pallor that develops )